[Shuie]

AR15 is the semi auto version of the M16. You'd know it if you saw it. Its available as a gas operated/assisted .223 or a straight blowback operated 9mm. Recoil is about the same in both (lite). They are both a lot of fun, but make sure you have a lot of outdoor real-estate or a good outdoor range if you want to shoot the .223. A short barreled .223 with what is essentially a muzzle break is not fun inside small enclosed places.