Abstract: An integral suppressor assembly including a trunnion integrally extending from the front of the upper receiver, a tubular hand guard mounted to the trunnion, and a suppressor baffle mounted to the rifle barrel within the hand guard. The trunnion provides a structural interface for connecting the hand guard to the upper receiver, as well as the rifle barrel. The suppressor baffle seats within and encloses the muzzle end of the hand guard and is detachably connected to the end of the rifle barrel The interior of the hand guard forms a large expansion chamber around the barrel that works in conjunction with the suppressor baffle to reduce the noise signature of the weapon. The suppressor baffle is configured to have vent channels that direct the expanding combustion gases expelling the bullet from the barrel rearward into the expansion chamber of the hand guard before ultimately venting through the suppressor baffle.