The original 55 grain M193 cartridge was, yes. It was a further development of an existing cartridge - the .223 Remington, itself derived from the .222 Remington.
Both guns are very excellent guns, but it just depends on the situation. If your in confined spaces, the m4 would be better due to its compactness; but if your outside, the m16 would be better due to its accuracy. Overall, I think the m16 is better, but that's just my opinion. Besides, there are better guns than the m16 series such as the m468 with its heavier round, and the scar with its interchangability between the 556 round and the 762 round.
Magazines for the M16 are made in 20 and 30 round capacity.
The AK round. The AK 47 fires a 7.62mm round. The M16/M4 fires a 5.56mm round.
yes and no the m16 veitnam was auto the one to day is 3 round burst
In the 1960's there was the Gyrojet gun which were actually miniature rockets but the caliber was larger than the .223 round of the M16
5.56mm
Yes it does.
the standard m16 shoots the 5.56mm, but it can be converted to shoot 9mm, 7.62mm, even .308
The typical AR15 fires the same type of bullet as the M16: a .223 caliber (5.56mmx45mm NATO) round. There are AR-15 rifles that have special barrels made for a variety of popular cartridges, even the little .22LR.
Not made as a standard item. It will be too long, and the rifle was not designed to support THAT much weight on the magazine catch.
The M16 assault rifle is chambered for the 5.56x45mm NATOcartridge. It can also fire the civilian .223 Remington round.
It was in development since 1957 and was then produced in 1960.