5.56 NATO

Colt

Colt Monolithic Carbine M4 .223 Rem / 5.56 NATO with Collapsible Stock and Magpul MBUS Sights

Colt

Colt Law Enforcement Carbine 5.56 NATO Rifle with Collapsible Stock and MAGPUL MBUS Sights

Colt

Colt M4 Carbine 5.56 NATO with 16.1-inch Barrel, Black Polymer Stock and Magpul Backup Sights

Colt

Colt M4 Carbine MK4 5.56 NATO with Geissele Rail and Magpul Sights

Colt

Colt M4A1 Carbine with 16.1-inch Barrel and 30-Round