Cam Pin The bolt cam pin rotates the bolt so it locks up in the barrel extension. With the bolt carrier still pushing backwards because of the inertia, the cam slot offsets the bolt lug, making the bolt rotate back into the unlocked state. Aside from the obvious benefits of not carrying around as much weight, this can also greatly reduce recoil.
Picking a handguard thats too short will leave your gas tube and gas block exposed. “Parts Diagram Ar 15”
