I am wanting to try one of the 7.62x39 uppers on an AR and was wondering if anyone has tried them. I understand that reliable magazines are hard to find but that they are out there. This might be an easy answer to rising ammo costs. Barreled Upper 16" 7.62x39MM Complete $459.95 <small>BU_76239MM</small> 16 HBAR barreled upper, 1x8 twist, chrome moly barrel, on aircraft quality aluminum A-2 or flat-top upper receiver.
Yep that what i found was the mags when curved shape didnt like to feed, although the Colt mags worked fine.
Beta C's are cool, but I would stay away from them for anything other than having fun. They tend to jam when dirty and I have had problems with reliable functioning with the one I have. As for the upper, my buddy had one so that he could go deer hunting with his M4. He eventually sold his and never got another and I never asked why. Next time I see him, I will ask.