Colt M4A1 Carbine
5.56x45mm NATO
The carbinized version of the venerable M16 series. The M4 carbine is used mostly by US special forces, but it is even used by
the Israeli military. It is said that the M4 carbine will replace the M16A2/
M16A4 assault rifle as the mainstay for the Us armed forces...
...but in MY opinion, I think the M16 should stay. The M4 is a great weapon and is battle-proven, but the M16 has a few advantages still over the M4. Although the M4 is full-auto (the M16 only fires 3-round bursts for its full-auto mode), very compact, and heavily
upgradable, the M16 has power and accuracy. The M4, on the other hand, excels in other areas over the M16, but it's not as accurate or powerful as the M16.
The idea of the M4 replacing the M16 should be heavily under debate. For now though, the M4 is a favored carbine for our special forces.