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.
creator
Metrics
Views
6.3K
Downloads
379
Project Info
release date
Jul 20, 2023
artifact types
CAD Object, Printable project, Reference model, Machinable Project
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.
