Mdt Sporting Goods Inc 105277Black Enclosed Forend Chassis System Black 6061-T6 Aluminum Replace existing XRS Forend With An Enclosed Version For Additional Barrel Protection. Integral ARCA, RRS/Dovetail Along The Entire Length Of The Forend. Additional M-LOK Attachment slots. Accommodates Up To a 1.25" Barrel Profile, Although using M-LOK Accessories May Interfere With a Barrel This Size. Includes All required Installation Hardware Material: 6061-T6 Aluminum Finish: Hardcoat Anodized