Our 7.62x39 bolt carrier assembly
is made specifically for the 7.62x39 ar-15 platform, it is cnc part
to fit the mentioned round and the firing pin is made for
that particular 7.62x39 ak47 round.
The bolt is mil-spec, heat treated,
and has a mil-spec finish. just drop it in your ar-15 7.62x39 bolt carrier
group, no gunsmithing is required to install.