Post by
sci2000tech »
https://forums.nicoclub.com/sci2000tech-u25313.html
Wed May 06, 2009 6:37 am
Yup, you can fire .22, 9mm, 5.7, 5.56, 6.8, .458socom, and 50 beowolf all on the stock lower. Just switch uppers, mags, and in alot of cases the buffer spring assy.
I think you can also shoot 7.62X39 with a stock ar lower, but I'm not positive.