Most AR-type rifles are chambered for the 5.56x45 cartridge - the standard cartridge used by NATO (and also by several non-NATO) forces for their military's assault rifles. They can also chamber the .223 Remington cartridge, although a firearm with a dedicated .223 Remington chamber should not be used for military 5.56x45 ammunition.
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.
There are a large number of differences based on the models of both guns, however the most notable is that the AR15 is a semi-automatic and the M16 is capable of semi-automatic or full automatic.
AR15, M16, M4, Ruger Mini 14
With ALL firearms, the bullet begins to drop due to gravity the instant that it leaves the barrel. To shoot at targets farther away, the rifle is aimed at a point above the target, and gravity draws the bullet down into the target.
the standard m16 shoots the 5.56mm, but it can be converted to shoot 9mm, 7.62mm, even .308
Noop. an M16 fires a 5.56mm (or .223 caliber) bullet. A .45 caliber shoots a bullet that is ~11.43mm.
5.56
Yes. The Colt AR15 is the original semi-auto version of the military M16. The rifle is now made by many manufacturers besides Colt.
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Yes
Shoot the Bullet happened in 2005.
5.56mm