AA-12 / USAS-12 Semi-Automatic Shotgun

about

3D printed body for a homebuilt AA-12 / USAS-12 semi-automatic shotgun copy which uses an internal self-contained improvised mechanism made from thick walled steel tubing and steel plate. A full assembly file is provided which will need final clean-up work and modification to suit materials available to the builder.

It can be made as a manual straight-pull by leaving out the gas tube and recoil spring assembly entirely.

The magazine is based on a design made by BoostWillis a number of years ago which will need further refinement

Videos to aid in understanding the lock-up action:

https://www.youtube.com/watch?v=SKbC7ldO3fY

https://www.youtube.com/watch?v=rlJEh-iSOds

Materials:

*The hole through the Middle Section/Upper will need to be modified to match the outside diameter of your receiver tube.

(Not limited to)

- Barrel: Either 20mm ID Seamless Precision Tube or 3/4" Schedule 40 steel tube (Hardware store 'black iron pipe' used for making slam-fire shotguns)
- Receiver tube: 1" ID Schedule 40 steel tube
- Gas tube:  1" ID Schedule 40 steel tube
- Locking Key: 8mm steel plate
- Locking Peg:  12mm (1/2") dia mild steel bar
- Firing Pin:  3mm steel bar + lock collar
- 1/2" steel bar, one end threaded
- 1/2" dome nut

 

An ambitious project worked on for the last three years which needs someone to take it under their wing and produce a functioning, reliable model.

 

 

files

File Extension
AA12-USAS-12 Printed V1.rar vnd.rar

versions

Version: 1.0.0 latest

initial upload

about

3D printed body for a homebuilt AA-12 / USAS-12 semi-automatic shotgun copy which uses an internal self-contained improvised mechanism made from thick walled steel tubing and steel plate. A full assembly file is provided which will need final clean-up work and modification to suit materials available to the builder.

It can be made as a manual straight-pull by leaving out the gas tube and recoil spring assembly entirely.

The magazine is based on a design made by BoostWillis a number of years ago which will need further refinement

Videos to aid in understanding the lock-up action:

https://www.youtube.com/watch?v=SKbC7ldO3fY

https://www.youtube.com/watch?v=rlJEh-iSOds

Materials:

*The hole through the Middle Section/Upper will need to be modified to match the outside diameter of your receiver tube.

(Not limited to)

- Barrel: Either 20mm ID Seamless Precision Tube or 3/4" Schedule 40 steel tube (Hardware store 'black iron pipe' used for making slam-fire shotguns)
- Receiver tube: 1" ID Schedule 40 steel tube
- Gas tube:  1" ID Schedule 40 steel tube
- Locking Key: 8mm steel plate
- Locking Peg:  12mm (1/2") dia mild steel bar
- Firing Pin:  3mm steel bar + lock collar
- 1/2" steel bar, one end threaded
- 1/2" dome nut

 

An ambitious project worked on for the last three years which needs someone to take it under their wing and produce a functioning, reliable model.

 

 

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Metrics

Views

9K

Downloads

515

Project Info

release date

Jul 20, 2023

artifact types

Reference model, Printable project, Machinable Project, CAD Object

library categories

Printable Firearms, DIY Guides, Machinable Projects

fabrication method

Hybrid

fabrication tool

3D Printer

release country

United States

language

English

license

No license

Firearm Info

type

Shotgun

platform

AA-12

caliber

12ga

parts

Lower Receiver, Upper Receiver, Frame, Stock, Handguard, Bolt

files

File Extension
AA12-USAS-12 Printed V1.rar vnd.rar

versions

Version: 1.0.0 latest

initial upload

The files shown on this site are only available to U.S. Persons, as defined at 22 C.F.R. 120.15. The files are also not available to persons outside the United States or to residents of and persons in the State of New Jersey, with the exception of Federal Firearms Licensees.

Ghost Gunner 3s, GG3s, True Desktop CNC, by Defense Distributed Ghost Gunner 3s, GG3s, True Desktop CNC, by Defense Distributed

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