[Guns4Fun]

Hi, i use the same buffer (stock) and lower for 9mm and .223. I have an oly arms 9mm upper and use a socom block with sten mags. Mine is a sbr, it started life at 10.5" now at 5.5" with a swr trident 9 on it. I honestly never switch it back to 223 anymore. I've had it for a few years now and it has always run great---although, sten mags are a pain to load without a loader but heck, they only cost $5 each.