The M16A4 served as the primary service rifle for the US Marine Corps from 1997 until 2015. -Essentially an M16A2 with a flat ...

The CAR-15 is simply an M16 with a short, carbine-length barrel ... To drain the bar­rel, point the muzzle of the rifle down­ward and pull the bolt back about 1½". As soon as air can bypass ...

The M16, like the AK-47, is also a gas-operated rifle and features a rotating bolt with direct impingement. The M16 had a higher rate of fire, 700-950 rounds-per-minute (rpm), compared to the 600 ...