The m16 bolt has the open-bolt bright machine shot version named the Colt Automatic Rifle with the heavier cylinder and integrated bipod. It has the typical squared shaped hand-guard with first pistol hold and carrying handle. It will likewise take biggerer MWG 90-round `` snail sound '' and 100-round Beta C-mags. The M16s arm is not just used to keep the firearm, but also to help sustain and strengthen the rifle while shooting, to provide for more precise fire. `` When the rifle arm is corrected right, it can give maximum stability for the arm and help lessen the consequences of the rifle's recoil. There are three fundamental types of rifle sling Modifications: The circuit arm, the hasty arm, and the three-point arm. ''
