O.K., so I want to put a 7.62x39 upper on my M&P 15 lower. This may be a stupid question, but can I load that cartridge in a standard 5.56/.223 mag? If not, what kind of 7.62x39 mag will work or where can I find an adapter? Help an idiot out, please.
Swoop
I understand that standard AK mags are the ones to use, I'm not sure that it works with the 5.56 lower.