For mounting an AR15 upper to the wall or pegboard. BCG mount fits in one of the bottom 2 holes with a #8 wood screw but you can change that in solidworks if needed. I haven't found a good way to mount to pegboard but zip ties through the top holes should be fine. Holes spaced for 1" pegboard but should also fit on a 2x4. BCG holder works on either side.

Should work with any AR15 upper/bcg/caliber but probably won't work for an AR10.

CTC A13

Doesn't Matter

No

.20

20%

Might be worth using more than 3 walls if you've got a particularly heavy upper. Print on the back with the hook facing up for maximum strength. I'd suggest gyroid infill.