Never heard of the arm strap requirements.
And as for the buffer tubes, there are some “adjustable length of pull” arm braces that work on standard mil spec tubes.
Search found 1 match
- February 26th, 2019, 6:12 pm
- Forum: DIY, Building, Gunsmithing and Custom Firearm Work
- Topic: AR 9mm pistol builds, the dark world
- Replies: 8
- Views: 7456