similar concept to MTR-10, but 15 sized
LBRY Tags: 3d2a; ar lower; bca-15
Hoffman Tactical AR-15 Super Lower
UBAR-9 COLT MAG LOWER RECEIVER
Conman's Castable AR lower Beta
similar concept to MTR-10, but 15 sized
LBRY Tags: 3d2a; ar lower; bca-15