Remember to set wall ordering from inside to outside, so things don't go stupid. This is my remix to Booligan's USW brace. Mimics OEM B&T stock, but it's totally a brace. Fits 1'' wide brace straps.
Also, the "hook" is nice to hang on your door knob.
Uses Chinese type 56 bayonet spring and m4x35 with tapered head. STEP is included so you can modify as needed. Figured this would be a sick option for a bipod mount.
Hinge is best print orientation (so far) has been on its side at .1mm layer height with touching bed only supports. Charging handle on its back at .12mm layer height with supports on touching bed only. Spring is printed vertically at .1mm layer height. Everything has been tested and successful. Be sure the 'clear out' any overhang in the charging handle spring hole with a razor or other tool. Also, press spring into hole and make sure it sets. All printed out of Inland tough PLA. Uses taper head m3 bolt and nut. I marked and cut down bolt to fit.