ATI’s Strikeforce Stocks allow a AR-15 stock and pistol grip fitted to Saiga shotguns without permentant modifications. The Saiga guns come from the factory with a hunting-style butt-stock and the trigger moved right back to the rear of the receiver, preventing a standard AK pistol grip from being installed without modifying the receiver (this is in order to claim that the Saiga is a sporting-only gun, not an AK with a hunting butt-stock).