If you reload you might consider doing your build in 300 AAC Blackout. It is a ballistic twin to the 7.62x39, MUCH more accurate, no special size bolt head (same as .223), 16.5" barrels readily availible, same .308 bullet as all other .30 calibers, match bullets galore availible, etc., etc., etc. You get the idea. And if you reload it would be less expensive to shoot than buying that junk 7.62x39 ammo out there.