5.56mm
The M-16 Carbine or M4 use a 5.56x45 Nato round or the civilian version .223 Remington
The gas propelling the bullet is tapped, and operates the bolt mechanism.
The M4 CARBINE IS BETTER THAN THE M16.
Depends on which military. US uses the M16A1 rifle, or the M4 carbine version of the same.
M4 is the carbine- shorter barrel
No one will give you an M4 rifle/carbine for free.
The Colt M4 Carbine .22 is a replica of the real M4 but in .22 caliber.
There is an M4 carbine in Call of Duty: Modern Warfare 2.
The US Army presently uses the M4 carbine, a shorter and much modified version of the Armalite AR15.
The M4 carbine has a muzzle velocity of 2,970fps(884m/s).
While the M4 Carbine is intended to fire a 5.56x45mm NATO round that is distinct from the .223 Remington, both are centerfire cartridges. So yes, the M4 Carbine is a centerfire rifle.
um an m4 carbine is a gun last time i checked, and i don't think a gun would be able to shoot a bullet with a paper hammer. so i would say none.