gdubyacobb
Active Member
I have looked around this forum and others for info on .223 vs. 5.56 ammo for ARs, and understand that the rule of thumb is .223 in a 5.56 but not 5.56 in a .223.
My Colt is stamped 5.56 on the barrel but the lower is stamped CAL. 223.
So...?
My Colt is stamped 5.56 on the barrel but the lower is stamped CAL. 223.
So...?