Semi-auto Weapons

© Brooke Clarke 2021

Background
Description
     Sterling
        Bolt Bounce
     Tavor SAR
     Steyr AUG   
     SIG stgw57
     Heckler & Koch G3
     Short Magazine Lee–Enfield (SMLE)
    
IMI Galil
   
Bren light machine gun
    Striker 12
 Full Auto
    
M2
    Pancor Jackhammer
   
Hill SMG/Pistol
    FN P90
    M3 Grease Gun
    Thompson SMG
        Replica M1928
    Patents
Bayonets
Ghost Guns
    Defense Distributors
        Liberator
        Ghost Gunner
    Tommy Built Tactical
    Polymer 80
    USFA Zip 22
    80% Sellers
    Information on DIY Guns
Related
References
Links

Background 

These are all California legal as of 2016 and can be registered in 2017 as assault weapons.  This means removing some restrictions that apply in 2016 for some of them.

Description

Sterling Mk 4 (L2A3) (Wiki)

Testing started in 1944 but it was put into service starting in 1953.
L2A3: (Sterling Mark 4) Adopted in 1956. Last regular version in service with the British Army, Royal Marines and RAF Regiment.
9mm 7.7" barrel.  So in California this is a semi-auto pistol, so the stock mounting ears have been cut off so it is not classified as a short barreled rifle.
There is a metal vane welded into the receiver which prevents installing the full auto bolt, so is a semi-auto, not a full auto.

Bolt Bounce

In the Design details section of the Wiki page it mentioned: "There are two concentric recoil springs which cycle the bolt, as opposed to the single spring arrangement used by many other SMG designs. This double-spring arrangement significantly reduces "bolt-bounce" when cartridges are chambered, resulting in better obturation, smoother recoil and increased accuracy."

YouTube:

Three parts kits purchased and the best bits used for the re-welding operation to make California legal semi-auto version.
Numrich 1410230 with barrel, no mag
Apex Sterling L2A3 - Kit - optional mags
Old Arms of Idaho - Sterling L2A3 Kit with barrel and mag

Spring kits from Surf Tactical.com http://surftactical.com

Fig 1

Sterling Mk 4 (L2A3)


Fig 2

Sterling Mk 4 (L2A3)


US Patents

Class 42 is Firearms and class 89 is Ordnance.

2424944 Folding stock for automatic firearms, William Patchett George, Filed: May 26, 1943 Pub: Jul 29, 1947, 42/72   
2426563 Recoil mechanism for automatic firearms, William Patchett George, Filed: Apr 1, 1943 Pub: Aug 26, 1947, 89/198 -
2432486 Fire controlling mechanism for automatic firearms, William Patchett George, Filed: Aug 17, 1942 Pub: Dec 9, 1947, 89/142, 298/22.0AE, 124/37    
2437548 Telescopic firearm, William Patchett George, Filed: Mar 13, 1944 Pub: Mar 9, 1948, 42/72, 42/73, 89/194 -
2467270 Folding bayonet for firearms, William Patchett George, Filed: Mar 13, 1944 Pub: Apr 12, 1949, 42/86 -
2510831 Cartridge magazine for automatic firearms, William Patchett George, Filed: Apr 18, 1946 Pub: Jun 6, 1950, 89/34, 42/50 - "one of the best" (see YouTube below)
3012479 Firing mechanism for automatic firearms, Ernest Ruffell Leslie, Sterling Engineering Company L, Dec 12, 1961, 89/142
3058222 Aperture sighting for firearms, William Patchett George, Oct 16, 1962, 42/142 -

YouTube: Forgotten Weapons -
British Submachine Gun Overview: Lanchester, Sten, Sterling, and More!  - Sterling SMG at the Range -
YouTube: Solscud: Sterling MK4 Select Fire Machine Gun - both open & closed bolt versions

Tavor SAR (Wiki)

Made in Pennsylvania rather than Israel because of gun laws.  Made to be semi-automatic.  0.223 caliber.  Bull-pup (Wiki)  design.

Fig 1
Tavor SAR



Fig 2
Tavor SAR



Steyr AUG (Wiki)

Designed in the 1960s. 0.223 caliber, but they are also made in NATO 7.62x51
Fig 1  Bull-pup (Wiki) stock assembly
Steyr AUG
Fig 2 Bolt assembly
Steyr AUG
Fig 4 Picatinny rail (Wiki), Chamber, separate from barrel
Steyr AUG
Fig 5 Short barrel assembly
Steyr AUG
Fig 6 long barrel assembly
Steyr AUG
4944109 Rifle,
                      Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Jul 31,
                      1990, 42/71.01, 42/75.01 -


4191089 Breech-closing mechanism for automatic rifle, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Mar 4, 1980, 89/181, 89/185 - bull pup
4555860 Rifle breech assembly, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Dec 3, 1985, 42/25 -
4702144 Cocking slide for automatic hand firearms, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Oct 27, 1987, 89/1.4, 89/181 -
4739570 Firearm, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Apr 26, 1988, 42/15, 42/39.5, 42/69.01 - chamber separate from barrel
4760663 Firearm, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Aug 2, 1988, 42/15, 89/155, 42/39.5, 89/33.03 - bull pup
4817496
Firearm, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Apr 4, 1989, 89/191.02 -
4916844 Hand-held firearm, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Apr 17, 1990, 42/75.02, 42/70.02 - bull pup
4930241 Hand-held firearm provided with a detachable sight, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Jun 5, 1990, 42/148 -
4941394 Hand-held automatic firearm, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Jul 17, 1990, 89/129.02, 89/142, 89/141 -
4944109 Rifle, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Jul 31, 1990, 42/71.01, 42/75.01 -
4949493 Firearm, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Aug 21, 1990, 42/15, 42/25, 42/39.5 -ejector,  bull pup
5852892 Rifle with bipod, Ulrich Zedrosser, Steyr-Daimler-Puch Ag, Dec 29, 1998, Dec 29, 1998, 42/94, 42/72 -

SIG stgw57 (Wiki)

I had a civilian version (Forgotten Weapons: SIG PE57) of this many decades ago.
Patent assignee: Energa,
YouTube: Bloke on the Range:
YouTube: Forgotten Weapons: SIG PE-57 Swiss Roller-Delay -

Also known as the SIG 510.  Used by from 1957 up to 1990.  Replaced by the SIG SG 550 (Wiki).
The long arm assigned to every able bodied man in Sweden.
7.5x55 (Wiki) Swiss caliber.
The action is a roller delayed blow back (Wiki) (see G3 below)
Fig 1 Barrel assembly
SIG
                      stgw57
Fig 2 Roller lock bolt assembly
SIG
                      stgw57
Fig 3 Stock assembly
SIG
                      stgw57
Fig 4 Bipod on barrel assembly
SIG
                      stgw57
Fig 5 Grip and rear sight assembly
SIG
                      stgw57
Fig 6 Grip and rear sight assembly
SIG
                      stgw57
Fig 7 front and rear ends of receiver with center demilled.
SIG
                      stgw57
Fig 8 Rifle assembled but with missing receiver.
SIG
                      stgw57
Fig 9 Bayonet & barrel
SIG
                      stgw57
Fig 10 bolt that interchangeable with old rifles
SIG
                      stgw57
Fig 11 CAD drawing of receiver
SIG
                      stgw57


Heckler & Koch G3 (Wiki)

Fires the 7.62 x 51 NATO round (.308). (Wiki)
The action is a roller delayed blow back (Wiki) the same as the SIG stgw57 above.
3283435 Breech closure, Koch Theodor, Heckler and Koch GmbH, 1966-11-08 (patent currently missing figures showing roller delayed mechanism, so see WikiMedia)
Heckler & Koch
                      G3
Heckler & Koch
                      G3

Short Magazine Lee–Enfield (SMLE) (Wiki)

In the 1960s there seemed to be a large number of various versions of this rifle for sale on the surplus market.
It fires the .303 cartridge (Wiki).
This is a Mk 3 which began production in 1907.

Short
                      Magazine Lee–Enfield (SMLE)
Short
                      Magazine Lee–Enfield (SMLE)

Bren light machine gun (Wiki)

These were made in the 1930s and fire the same British .303 round as the SMLE above.


Bren light
                      machine gun
Bren light
                      machine gun

IMI Galil (Wiki

Made in the late 1960s.  This one is in .223 (5.56 x 45).

IMI Galil
IMI Galil

Possible Patents:
US3618457 Rotary and sliding firearm bolt with eternal cam, Arthur Miller, 1971-11-09

Striker 12 (Wiki)

YouTube: Forgotten Weapons:  Striker 12: Shotgun Turned "Destructive Device" - it's a drum fed semi-auto 12 Ga shotgun.  To minimize the trigger effort the drum is spring wound.  (@9:23) "In 1994, public pressure led the Clinton administration to designate the Striker-12 along with the Cobray Streetsweeper and USAS-12 (Wiki) shotguns as Destructive Devices under the 1934 National Firearms Act."

4426802
                      Firearm, Hilton R. Walker, Aserma Mfg, 1984-01-24
4426802 Firearm, Hilton R. Walker, Aserma Mfg, 1984-01-24, - The Striker-12
The main problem to be overcome is the rotational inertia of the magazine. 
A spring advances the cylinder, hence it's a semi-automatic gun.
The South African police deemed this a semi-auto gun, and so it was banned. (@4:53)

This was copied as the Cobray SWD Street Sweeper.
5092069
                      Firearm, Hilton R. Walker, Hoffmann Walker,
                      1992-03-03
5092069 Firearm, Hilton R. Walker, Hoffmann Walker, 1992-03-03, - The Protecto
It seems the main problem is gun laws where a claim is made:
"The only firearms having drum magazines, of which the Applicant is aware, are either automatic or semi-automatic firearms. However for many different applications of firearms, automatic and semi-automatic firearms are not permitted. In this invention a firearm having a drum magazine is disclosed which is not an automatic firearm."
Designed to be "manually operated" by requiring advancing the drum by turning the front grip.

In the U.S. Sentinel Arms Corp, Ridgway, PA

Also see the 40mm M32 Multiple Grenade Launcher (MGL) "Six Pack Attack" & the Manville gas gun

Full Auto

Forgotten Weapons: Origins of Constant Recoil: The Ultimax Mk3 & Knight's Assault Machine Guns at the Range - both highly praise the "Constant Recoil" system in that it adds a lot of control to full automatic fire.  The particular guns made for Singapore had some reliability problems.  It's not clear if that's related to the constant recoil aspect or something else.  So far have not found the patent for this.

M2

While watching the Forgotten Weapons YouTube: Ma Deuce: The Venerable Browning M2 .50 Caliber HMG - there was a closeup of the patent numbers.
So here are those patents plus other related/referenced patents.

1293021 Automatic machine-gun, John M Browning, 1919-02-04, - M1919 Browning machine gun (Wiki)
1628226 Automatic firearm, Browning John, 1927-05-10, -
RE19159 (was: 1803351) Reversible feed mechanism for Machine Guns,
Frederick T Moore, Pfeiffer Christian, Colt's Patent Fire Arms Mfg,
1803351 Reversible feed mechanism for machine guns, Frederick T Moore, Pfeiffer Christian,
Colts Mfg, 1931-05-05, - belt from left or right
1845242 Bolt operating mechanism for machine guns, Richard C Coupland, 1932-02-16, -
1858498 Bolt operating mechanism for machine guns, James L Hatcher, 1932-05-17, -
1919242 Cooling system for firearms, Frederick T Moore, Colts Manufacturing Co, 1933-07-25, - either air or water cooling
1936254 Reversible feed mechanism for machine-guns, Frederick T Moore, Colts Manufacturing Co, 1933-11-21, - for left or right hand feed
2101851 Machine gun jacket mounting, Samuel G Green, 1937-12-14, - "
The purpose of the invention is to provide a machine gun trunnion block which is adapted to mount different types of jackets without resorting to the use of matched threads and to provide means on the trunnion block for locking the Selected jacket in a predetermined position.
2108060 Back plate latch for machine guns, Samuel G Green, 1938-02-15, - allows the back plate to be easily removed.
2110165 Machine gun, Frederick T Moore, Colts Manufacturing Co, 1938-03-08, - "The invention relates to a machine gun, particularly to air-cooled machine gun, having a readily detachable barrel. One of the objects of the invention is to provide a machine gun of the reciprocating barrel type, wherein the barrel may be readily put in place or removed from the front of the gun without disturbing or disassembling any other essential gun part."

Pancor Jackhammer

This is a selective fire (semi or full auto) 12 Gz shotgun that uses 2-3/4" shells.  It uses a 10 shot revolver type magazine.

Forgotten Weapons:  YouTube:
Pancor Jackhammer: The Real One - This is the only surviving one of the three made.
Pancor Jackhammer Mk3 - this is an non functional prototype missing parts because never fully built

The videos mention:
HP White Laboratory, which closed in 2020 - here's their YouTube channel: HP White Laboratory.
Here's a snapshot from 7 Aug 2012 of their web page.

Webley–Fosbery Automatic Revolver (Wiki)
584631 Recoil
                      operated firearm, G. V. Fosbery, 1897-06-15
584631 Recoil operated firearm, G. V. Fosbery, 1897-06-15, -

Also holds UK patents: 
GB189515453 Improvements in Revolvers, Magazine Pistols, and other Small-arms, 1896-07-04
GB189612470 Improvements in Pistols and other Small-arms, 1896-07-11
GB189624155 Improvements in Pistols and other Small Arms, 1897-10-23
688217 Automatic
                      revolver-firearm, William John Whiting,
                      1901-12-03
688217 Automatic revolver-firearm, William John Whiting, 1901-12-03, -
"This invention relates to small-arms of the breakdown-revolver type, and has reference to automatic revolvers primarily of the Webley-Fosbery class." "... in conjunction with means for insuring the rotation of the cylinder in the proper direction."  oops

So this adds the zig-zag to the outside of the cylinder.

Whiting holds a number of patent on this: 584631, 688216, 688217, 700592,

The way the revolver cylinder is grooved on the Real One is different than shown in the below patents.
Both of these patents look like the MK3 - it has the cast handle/sight that dovetails onto the receiver.

4709617
                          Firearm, John A. Anderson, 1987-12-01
4709617 Firearm, John A. Anderson, 1987-12-01, -

Fig 1 is the exploded view.
4856410
                          Firearm, John A. Anderson, 1989-08-15
4856410 Firearm, John A. Anderson, 1989-08-15, -

Fig 1 is just the cylinder.  The patents cited are mostly about the cylinder



Hill SMG/Pistol

Forgotten Weapons: Hill SMG/Pistol: Inspiration for the FN P90, 15:39

2624241 Gun
                      action, John L Hill, 1953-01-06
2624241 Gun action, John L Hill, 1953-01-06, -
Notice that the rounds in the magazine are turned 90 degrees from the barrel.
Turntable is part of receiver.
2773325
                      Magazine and cartridge container assembly, John L
                      Hill, 1956-12-1
2773325 Magazine and cartridge container assembly, John L Hill, 1956-12-11, -
2882635 Tubular
                      combined cartridge container and magazine unit,
                      John L Hill, 1959-04-2
2882635 Tubular combined cartridge container and magazine unit, John L Hill, 1959-04-21, -
3064382 Gun
                      with ejection through hand grip, John L Hill,
                      1962-11-2
3064382 Gun with ejection through hand grip, John L Hill, 1962-11-20, -

FN P90

The Hill SMG was the precursor to the FN P90 (Wiki).
Forgotten Weapons: How to Classify the H&K MP-7 and FN P90P90: FN's Bullpup PDW;

5012743
                      High-performance projectile, Jean-Paul Denis, Marc
                      Neuforge, FN, Priority: 1988-12-05
5012743 High-performance projectile, Jean-Paul Denis, Marc Neuforge, FN, Priority: 1988-12-05, Pub: 1991-05-07, -

FN 5.7×28mm (Wiki) - new round to penetrate Russian military body armor.
The case has straight walls, no taper like on most rifle cartridges.  This was probably done to allow stacking in the unique magazine of the P90.

 
4905394 Top
                      mounted longitudinal magazine, Rene Predazzer, FN,
                      1990-03-06
4905394 Top mounted longitudinal magazine, Rene Predazzer, FN, 1990-03-06, -

They have the turntable in the magazine.

M3 Grease Gun

The inventors for the Grease Gun: Frederick W Sampson and George J Hyde also were involved with the FP-45 Liberator Pistol.
In Jan 1943 the M3 Grease Gun replaced the M1A1 Thompson.
YouTube: Forgotten Weapons:
M3 and M3A1 Grease Gun SMGs -
Shooting the M3A1 Grease Gun -
Suppressed OSS M3 Grease Gun and Bushmaster Booby Trap Trigger - "Booby Trap" backwards spells "Party Boob"
Valkyrie Arms Semiauto M3A1 Grease Gun semi-auto is legal in DC.
Denix: Collectors armoury:  SKU: 22-1313 Non-Firing Replica US "Grease Gun" .45 Submachine Gun
SARCO: REP44 Grease Gun Replica With Sling And Cover - this is the M3 not the M3A1
2403306 Firearm
                      construction, Frederick W Sampson, George J Hyde,
                      GM, App: 1944-05-01
2403306 Firearm construction, Frederick W Sampson, George J Hyde, GM, App: 1944-05-01, Pub: 1946-07-02, -
2418906 Breech
                      bolt retracting means, Frederick W Sampson, George
                      J Hyde, GM, App: 1944-05-01
2418906 Breech bolt retracting means, Frederick W Sampson, George J Hyde, GM, App: 1944-05-01, Pub: 1947-04-15, -
2424194
                      Extensible shoulder stock for firearms, Frederick
                      W Sampson, George J Hyde, App: 1944-05-01
2424194 Extensible shoulder stock for firearms, Frederick W Sampson, George J Hyde, GM, App: 1944-05-01, Pub: 1947-07-15, -
Note the FP-45 Liberator pistol and this sub machine gun are both made mainly out of sheet metal.
This M3 has charging handle.
2428683 Firearm
                      safety, Frederick W Sampson, George J Hyde, GM,
                      App: 1944-05-01
2428683 Firearm safety, Frederick W Sampson, George J Hyde, GM, App: 1944-05-01, Pub: 1947-10-07, -
Tab on dust cover blocks bolt in either forward or cocked positions.
2539554 Trigger
                      and sear mechanism, Frederick W Sampson, George J
                      Hyde, GM, App:1944-05-01
2539554 Trigger and sear mechanism, Frederick W Sampson, George J Hyde, GM, App:1944-05-01, Pub: 1951-01-30, -
This M3 has charging handle.

Thompson SMG

The various models of the Thompson Sub-Machine Gun (Wiki) were designed by a small group called Auto Ordnance (Wiki) and manufactured on contract by Colt (Wiki) or Savage Arms (Wiki).

YouTube:
Forgotten Weapons: Thompson 1921: The Original Chicago Typewriter - 800 RPM
@8:01: Patents: March 9, 1915 (1131319), May 4, 1920, May 25, 1920, May 25, 1920, July 27, 1920, Aug 10, 1920, Sep 7, 1920, Oct 26, 1920, Dec 28, 1920

The Marines' First SMG: 1921/28 Thompson Gun -  @4:30 over stamp; 600 RPM by Oscar Payne;

Shooting the Thompsons: Comparing the 1921, 21/28, and M1A1 - 1921: 960 RPM, 1921/28: 830 RPM, M1A1: 655 RPM
Ken Hackathorn on the Thompson and the MP5, 26:15 -
Model 1927 Thompson Semi Automatic Carbine -

Replica M1928

Collectors Armory: Replica Thompson M1928 Submachine Gun Non-Firing, SKU: 22-1092 Order: May 7, 2021, expected ship date June 4, 2021.

Fig 1
Replica
                      Thompson M1928
Fig 2
Replica
                      Thompson M1928
Fig 3
Replica
                      Thompson M1928

Fig 4 Bolt cocked and
will slam home when trigger is pulled
Rear sight in up position.
Replica
                      Thompson M1928





Patents


1312687
                      Firearm, Theodore H Eickhoff, Auto Ordnance,
                      1919-08-12
1312687 Firearm, Theodore H Eickhoff, Auto Ordnance, 1919-08-12, -

Maybe developed for the Thompson Autorifle (Wiki) but also used on the Sub Machine Gun.

1329444 Gun-barrel, Thompson John Taliaferro, 1920-02-03, - not as tight a fit so reduce wear and temperature in a machine gun.
347755
                      Cartridge-magazine, Oscar V Payne, Auto Ordnance,
                      1920-07-27, - 50 round drum magazine
1347755 Cartridge-magazine, Oscar V Payne, Auto Ordnance, 1920-07-27, - 50 round drum magazine
1350619
                      Cartridge-magazine, Oscar V Payne, Auto Ordnance,
                      1920-08-24, -20 round stick magazine
1350619 Cartridge-magazine, Oscar V Payne, Auto Ordnance, 1920-08-24,  -20 round stick magazine

1351141 Buffer, Thompson John Taliaferro,1920-08-31, -
1425808 Breech
                      mechanism for guns, Thompson John Taliaferro, Auto
                      Ordnance, 1922-08-15
1425808 Breech mechanism for guns, Thompson John Taliaferro, Auto Ordnance, 1922-08-15, 89/152; 89/142; 89/190; 42/69.02; 89/187.01; 89/198 -

Shows single control: Safe, Semi-auto, Full-auto - but this was not used.
1425809
                      Breech-closure mechanism, Thompson John
                      Taliaferro, Auto Ordnance, 1922-08-15
1425809 Breech-closure mechanism, Thompson John Taliaferro, Auto Ordnance, 1922-08-15, 89/187.01; 89/190; 42/106 -
Cites: 1131319 Breech-closure for firearms, John Blish, 1915-03-09, - Blish Lock (Wiki) a myth, really blow back.
1636357
                      Anticlimb device, Richard M Cutts 1927-07-19, -
                      Cutts Compensator
1636357 Anticlimb device, Richard M Cutts Jr., Richard M. Cutts Sr., 1927-07-19, - Cutts Compensator (Wiki: Muzzle Break)

World War Two Heats Up: The M1928A1 Thompson SMG  -
@8:50 Patent numbers (not dates):1131319, 1338866, 1340848, 1340843, 1347734, 1349345,1352414, 1357208, 1363809, 1403623, 1406546, 1408276, 1817321

Patents

1338866
                      Firearm
1338866 Firearm
"Heretofore, one of the serious faults in gun design has been the failure to secure symmetry of conformation and consequent equality of distribution of weight and of thrust about the longitudinal axis of the piece. This failure renders the gun more difficult to aim and results in frequent break ages due to asymmetric stresses. When the lack of symmetry appears in reciprocating parts its deleterious effect is very much increased. The lack of balance in weight of these reciprocating parts carries the resultant of the thrust due to the movement of the parts, out of the line of the longitudinal axis of the piece. This eccentrically oper ating thrust creates a lateral component tending to turn the gun and to cause the parts to chatter and ultimately break. And this eccentric component of the thrust is particularly marked in machine guns and other rapid-fire guns where the reciproction takes place at a rapid rate."

1340891 Breech-closure,

1340943 Breech-closure,

1347754 Firearm,
1349345
                      Firearm
1349345 Firearm,

1352414 Breech lubrication,

1357208 Firearm,
1363809
                      Firearm
1363809 Firearm,
1403492 Hammer
                      construction, Theodore H Eickhoff, Auto Ordnance,
                      1922-01-17
1403492 Hammer construction, Theodore H Eickhoff, Auto Ordnance, 1922-01-17, -
cited in patent 1817321
Fires from a closed bolt in semi and full auto.
Hammer (24), Firing Pin (18)
1403623 Gun
1403623 Gun,
Shows single control: Safe, Semi-auto, Full-auto - but this was not used.

1406546 Breech closure for guns,
1408276 Gun
                      sight
1408276 Gun sight, Theodore H Eickhoff, Auto Ordnance, App: 1920-12-22, Pub: 1922-02-28, -

I think this was added for "Marketing" rather than for function.  The thinking may have been someone who saw the same sight on match rifles might ass-u-me that the Thompson was an accurate gun.

The sight in the Forgotten Weapons on the 1921 model was marked Lyman.  The closest patent with "Lyman" as inventor was 10 years after, in 1930. 
1750676
                              Gun sight, Charles E Lyman Jr, 1930-03-18 1750676 Gun sight, Charles E Lyman Jr, 1930-03-18, 42/137 - This is probably NOT the correct patent since it's a couple of decades too new.


1433945 Gun mechanism, Theodore H Eickhoff, Auto Ordnance, 1922-10-31, - Thompson Autorifle (Wiki)?
1437889 Fire
                      control for automatic guns, Theodore H Eickhoff,
                      Auto Ordnance, 1922-12-05
1437889 Fire control for automatic guns, Theodore H Eickhoff, Auto Ordnance, 1922-12-05, -

This is the dual control system (Full or Semi Auto & Fire or Safe) rather than the single control selector switch that's shown on all (?) the other Auto Ordnance patents for the Thompson.


A single part sear is shown in patent
2053489 Automatic firearm, Norman George (UK), Auto Ordnance, 1936-09-08 - Blish block shown but not mentioned.
Patent date far after the BSA Autorifle (Wiki) so what gun used this?

1544566
                      Cartridge extracting and ejecting mechanism for
                      firearms, Theodore H Eickhoff, Auto Ordnance,
                      1925-07-07
1544566 Cartridge extracting and ejecting mechanism for firearms, Theodore H Eickhoff, Auto Ordnance, 1925-07-07, -
"In the usual form of firearm, in which the extractor and ejector mechanism is controlled by retraction of the bolt in the receiver, as by recoil, the speed of travel of the bolt is so great that the cartridge is thrown a considerable distance from the firearm with an objectionably large force."  This was a big problem with the 1923 Thompson Autorifle (Wiki).
1817321
                      Firearm, Oscar V Payne, Auto Ordnance, 1931-08-04
1817321 Firearm, Oscar V Payne, Auto Ordnance, 1931-08-04, - This is for the 1921/28 over stamp for the Marines.
"The desirability of slowing down these guns to a reduced rate of fire has long been realized and in peace-time the military authorities have consistently refused to accept guns operating faster than approximately five or six hundred shots a minute." 

They claim by increasing the weight of the actuator more speed reduction is obtained than by just increasing the weight of the bolt.

This is the upgrade for the Marines to lower the cyclic rate.  Notice:
(12, 13, 14) hammer, firing pin & spring), (18) Blish block, (Fig 3) heavy weight charging handle/actuator

The Iconic American WW2 Thompson: the M1A1 -Blish brass part removed, mass added to bolt, charging handle on side, no provision for drum, used 30 round stick mag,
The M1A1 has the firing pin fixed to the bolt face.
Auto Ordnance holds about 109 patents.

Bayonets (Wiki)

The bottom two bayonets in Fig 1 were made by Ontario Knife Co.
All of them fit the M-16 family of rifles.

Fig 1
Bayonets
M7 (Wiki)





M9 (Wiki)
NSN: 1095-01-227-1739
TM9-1005-237-15P
TM9-1005-237-23&p





OKC 3S (Wiki)
NSN: 1095-01-521-6087

20050015998 Bayonet having a serrated edge and a balanced positioning access point, Nicholas Trbovich, Kathlyn Green, Priority: Jun 12, 2003, Pub:  Jan 27, 2005 applies to the OKC 3S
4821356 Military bayonet and scabbard, Charles A. Finn, Apr 18, 1989 - applies to the M9 - cuts not only wire but also packing strap
3076280 Means for removably securing a bayonet to a rifle, Johannes Bervoets, Staatsbedrijf Artillerie Inric, FIled: Mar 30, 1961, Pub: Feb 5, 1963 -

Ghost Guns

It's possible to make a firearm from scratch, but that's not practical since, in the U.S. you can buy gun parts with no restrictions except the receiver on which gun manufacturers engrave a serial number and other markings that are prescribed by law such as the manufacturer or importers name and the caliber.  So you could buy a hunk of metal and machine your own receiver.  As a joke 80 percent Arms offers a 0% receiver for $29.  Note this is just a block of 6060-T6 aluminum that's 8"x4.5"x1.5" that you could buy from any metal supplier.  So that 0% receiver is always going to be available.

Then the question becomes how much machining can be done to raw metal and still have it classified by the ATF as a gun part rather than a receiver?  The simple answer is that 80% of the receiver can be machined without the person doing that machining being deemed as a manufacturer which would require them to be licensed and to engrave the appropriate serial number and other markings.

For each model of gun samples need to be submitted to the ATF to get the coveted approval letter that says you have come up with an approved 80% receiver, i.e. you are selling a gun part.

Defense Distributors

Liberator

The first plastic 3D printed gun, the Liberator single shot pistol (Wiki) was designed by Cody Wilson (Wiki) of Defense Distributors.
Note the 3D pistol was named after the W.W.II FP-45 single shot .45 pistol (Wiki) invented by George Hyde (Wiki) who also invented the M3 "Grease Gun" (Wiki)  sub-machine gun.

Ghost Gunner

Later Defense Distributors came out with the Ghost Gunner which is a milling machine designed to make lower receivers for:
AR-15, AR-308, AR-9, AR-45, Polymer80, 1911, engraving, Serialization.
It expects to start with an 80% receiver, but I suspect it would not be a stretch to start with a 0% receiver.

Tommy Built Tactical

The idea was to solve some of the problems with the Defense Distributors guns.  (AFAICR they self destructed after a few shots).
T36 Receiver -  injection molded, glass filled polymer compatible with most German G36 (Wiki) parts and accessories - ATF FAQ 15Mar2021 -
FGC-9 (Wiki) based on designs by Philip Luty (Wiki) author of Expedient Homemade Firearms (pdf).
Forgotten Weapons: Weapons as Political Protest: P.A. Luty's Submachine Gun -
ARES: Publications -  
P.A. Luty 9 mm sub-machine guns -

Polymer 80

The Glock pistol is made on a polymer frame (not metal) (Wiki).  This was a ground breaking development.  The Polymer 80 company makes a number of 80% receivers out of Polymer rather than metal.  They have had some legal problems related to the city of Syracuse, NY et al suing BATF because ATF decides what's an 80% receiver on a case by case basis rather than having a rule.  Docket: 1:20-cv-06885 SDNY, Case: 1:20-cv-06885

Case: 3:20-mj-00123 Search Warrant: Polymer80 This case is based on the sale and shipment of "Buy Build Shoot Kits".  The BATF seems to be saying that the Polymer 80 pistol frame as submitted is not a firearm, i.e. it's a gun part.  But when Polymer 80 ships their frame and a kit of gun parts all in one box that collection of parts becomes a firearm.  So the BATF position is it would be OK to sell the frame blank, but not to sell it along with other parts which would allow making a functional gun. But what does that mean when someone builds a working gun from an 80% receiver?  Is it legal to build a gun from a 0% blank, i.e. raw metal?

USFA Zip 22

U.S. Fire Arms (USFA) Zip 22 (Wiki) - Forgotten Weapons: USFA Zip 22: How a Garbage Gun Destroyed A Good Company - Zip 22: Shooting the Worst Gun Ever -
Because the moving parts are so light they cycle at an extremely fast rate.  So fast that the gun can not function.
20150323267 Compact semiautomatic firearm,
                        Douglas F. Donnelly, Usfa/zipfactory LLC,
                        2015-11-12
20150323267 Compact semiautomatic firearm, Douglas F. Donnelly, Usfa/zipfactory LLC, 2015-11-12, -

80% Sellers

5D Tactical - AR-15, AR-308, Glock, AR-9
80% Lowers -
80percentArms -
80lowers -
Polymer80 - had some legal trouble -nearly all items out of stock
Brownells - 80% lower - -nearly all items out of stock
Precision Reflex - Forged 80% AR-15 lower

Information on DIY Guns

Impro Guns: Guns made in garages from around the world - Photos sometimes with link to a news story.  A wide assortment of DIY guns.-
     Rockets & Grenade Launchers -
     Pen Guns - Automatic center punch, flashlight, tire gauge

Cal Guns: California Center fire, Semi-Auto Rifle Identification

Related

40mm Grenades & Related
AN/M8 Pyrotechnic Flare Pistol & Gyrojet Pen Flare Launcher
Hammerlli M150 Free Pistol
FN FAL ".308 Match" Rifle, AR15/M16/M4 parts table with optical sights, Ballistics info.
Daisy BB Rifle
Pop Guns
Survival Kit with Pocket Pen Gun flare launcher
Ruger SP101 .357 Magnum Revolver
Sonobuoys
including Vietnam outdoor intrusion detectors, CRT-1 the first U.S. sonobuoy
Torpedoes including: Naval mines, Depth Charges, Hedgehogs

References

Denix - Collector's Armoury - Replica Thompson M1928 w/drum mag.  made of metal and wood, not plastic.

Links

PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale
Page Created 15 Oct 2016