Springfield Armory XD5003 Mag Sleeve made of Polymer with Black Finish & 1 Piece Design for 9mm Luger, 40 S&W Springfield XD Magazine $12.99
Rise Armament RA701223BLK RA-701 Compensator Black Nitride 416R Stainless Steel with 1/2"-28 tpi Threads & 2.50" OAL for 5.56x45mm NATO AR-Platform $89.99