Quote Originally Posted by turnburglar View Post
2. The AR magwell will not accept a magazine designed for the larger diameter round. Good luck finding anything close to a reliable magazine that holds a decent amount of rounds. My buddy tried a 7.62x39 AR; and mags were the biggest blocker.
This is (no longer) correct. Years ago, 7.62x39 AR15 magazines were not reliable. Now there are options that are. I have RZE Unimags, ASC and D&H magazines. The ASC and D&H are designed specifically for 7.62x39. The RZE Unimags run multiple cartridges. All run 100% in a my Windham Weaponry and Bear Creek Arsenal AR15's. I even put those uppers on my M16 lower and they run through the 7.62x39 on full auto without issue.
https://www.youtube.com/watch?v=ma82EphaORQ&t=1s