MMcfpd
Member
My AR-15 is a Colt Gov't. Carbine, model 6520, with the LE restriction on the magwell. The lower receiver is stamped .223 cal and that's what the manual says for ammunition. The barrel is marked 5.56 NATO.
So, can I use 5.56 ammo? Might the gun even like it a little bit better?
So, can I use 5.56 ammo? Might the gun even like it a little bit better?