The M4 carbine has a muzzle velocity of 2,970fps(884m/s).
The M4 CARBINE IS BETTER THAN THE M16.
No one will give you an M4 rifle/carbine for free.
M4 is the carbine- shorter barrel
With a loaded 30-round STANAG magazine, the M4 carbine weighs 3.1 kilograms (6.9 pounds).
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.
5.56mm
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.
Perhaps they just forgot to add the "A1" to the nomenclature in CoD4. But yes, you are correct - the standard M4 carbine has the three round burst feature, while the M4A1 and the Canadian variant of the M4 (the C8) have full auto capability.
The M4 carbine was adopted into service with the United States armed forces in 1994.
Gas operated, magazine fed, select fire, 5.56 carbine.