5
"law tactical" style AR adapter.
(forum.guncadindex.com)
Discuss anything GunCAD related. If you need help, see /c/help. If you think you're discussing a thing a lot of the time, consider making your own separate community.
Abide by the global rules or be smitten.
Shitty stock image may be changed at moderator discretion.
I've got one, and I don't think it would be feasible to make one printed. It might be diyable if it's made from a bunch of stacked SCS plates, but then you would have to deal with adding threads for the buffer tube.