5.56 NATO vs .223 Remington

[Phoenixent]

Thanks Nyles for explaining the difference between .223 Rem and 5.56 NATO.

We had a PD bring in their Bushmaster built carbines with stainless steel barrels as they would not function on Full Auto firing 5.56 NATO. We had to go in with a 5.56 NATO chamber reamer and give them the correct chamber for the cartridge. Once that was done they worked perfect in Full Auto mode.