Please use the original screw for the Forearm that comes with the gun. Then for the Riot Grip, you can use the screw, lock washer and washer that comes included. Included with a rubber hand grip for Riot Grip. There are two different models for the brawler 410/45 colt. Then the 300 blk out and 5.56 they are the same forearm and fit the same. There is no firearm included or regulated parts. Please contact me if you have any questions.
