The MR7 is one of YHM lightest handguards to date, but you can still add accessories along the entire handguard length, even at every 45 degree position. The MR7 Handguard comes with all necessary parts for installation, including: Mid-Length M-LokA(R) Handguard Barrel Nut Jam Nut Anti-Rotation Screws Installation Instructions" Mfg: Yankee Hill Machine Co., Inc.