SaMx
Member
So I've noticed a few places offer AR uppers and kits in this caliber and I wondered if anyone has used it. I looked up some info on it, and it basically seems like a .223 necked up to .30 caliber, that was designed as a subsonic round for suppressors, but can be loaded supersonic too. It seems like ballistically it's really similar to 7.62x39, so I'm surprised it's not more popular for hunting with the AR-15.