Originally Posted by
meleagertoo
Inended to match captured NATO stock isn't it, unless I'm mistaken?. Not daft, that, is it?
Nope, not in this case. Iirc some stuff was (fuel couplings), but their ammo is totally different. 7.62x39mm (AK ammo) is a different length to NATO ammo (7.62x51mm) and is fundamentally incompatible. The AK was conceived much more as a sub-machine gun rather than the "battle rifle" typically associated with 7.62 NATO (FAL etc)
NATO ammo is (for m80) a 10g bullet doing 850m/s ish while Soviet is an 8g bullet doing 715m/s ish, to give a rough comparison in "oompf"