6.75" Two-Piece Handguard Rail for AR-15 / M4 Rifle
MST Optics 2-Piece 4/15 Drop In 6.75" Handguard Quad Rail Scope Mount
MST Optics Official Product. AR15/M4 two-piece quad rail drop-in design is constructed of T6 6061 anodized aircraft grade aluminum for strength and durability, and comes in a Black finish. This will replace the hand guard and will give you plenty of space to mount accessories such as: optics, lights, lasers & other tactical gear. It is compatible with most carbine length direct impingement gas systems and accepts all standard Weaver/Picatinny 1913 accessories. Includes all hardware needed, no gunsmithing is required.