what is the difference between 223 and 5.56 ammo

“Spikes Tactical 9mm Luger AR-15 Complete Upper Receiver” has been added to your cart. View cart

“223 5.56×45 Ammo 55gr FMJ Federal American Eagle (AE223BKX) 1000 Round Bulk Case” has been added to your cart. View cart

“CobraTec CTK-1 OD-Green OTF Knife – 2.75″ Plain Tanto Blade with Nylon Sheath” has been added to your cart. View cart

“223 5.56×45 Ammo 55gr FMJ Federal American Eagle (AE223BKX) 1000 Round Bulk Case” has been added to your cart. View cart