The AR-15 was used in the Sandy Hook massacre, the Aurora theater… MENU. News. What's The Difference Between An AR-15 & An M16? by Kastalia Medrano. June 16, 2016. ORLANDO SIERRA/AFP/Getty Images.

The M16 lacks maneuverability compared to the M4 and other weapons. A large part of why the M4 carbine is popular with troops is its overall maneuverability in close quarters.

The Type of M16 Used Depending on the Era You Served. When I enlisted in the Army in 1999, we used the A2, and then I had familiarity with the A3 fully automatic in officer training.

First adopted in 1962, the select-fire AR-15/M16 in its various forms has armed the U.S. military for more than 50 years.

The main functional difference between the military’s M16 and M4 rifles and a civilian AR-15 is the “burst” mode on many military models, which allow three rounds to be fired with one ...

Eaton broke down the differences between the M16, M4 and AR-15 in the thread of seven tweets. He said those opposed to assault weapon bans were playing with semantics, when they claimed any ...