Air Force Classroom Familiarization w/ The M4 Carbine Template

The M4 Carbine is a shortened version of the M16A4 Rifle that fires a 5.56mm cartridge The former has a 14" barrel opposed to the 20" of the latter. The former is further differentiated from the the latter that it included a telescopic buttstock. The M4 is adopted by all branches of the US military. .