ARs in 7.62 are fun and if you use good mags (C Products), you should have a fun reliable product. The issue is the bolt. In order to make the cartridge work in an AR,they have to really remove alot of steel in the bolt. This produces a less thick wall where the base of the cartridge sits in the bolt, which results in more bolt failures with the AR47. If you go this route, I would stock up on spare bolts, as this is a failure prone area. No way around it, less steel, more chance of fatigue on bolt.