What is the purpose of the recessed cut in upper receivers?
9019C032-3B80-455D-9B5D-9F053C68422F.jpg
What is the purpose of the recessed cut in upper receivers?
9019C032-3B80-455D-9B5D-9F053C68422F.jpg
You won't outvote the corruption.
Sic Semper Tyrannis
It is a clearance cut for an autosear,
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