Battle Arms Development RIGIDRAIL M-LOK AR-15 Handguard

Features: Propietary RIGIDRAIL(TM) rail design to balance between light weight and strength/rigidity Partial Picatinny Top Rail (Matching BAD556-LW Lightweight Upper Receiver) Material: Aircraft Grade 6061-T6 Aluminum Inner Diameter: 1.315" M-LOK Slots at 3, 6, 9, and partial 12 o'lock positions Additional Single M-LOK Slots at (4) 45deg Positions for Forward Mounting Light, Laser, etc. Barrel Nut Diameter: 1.378" Barrel Nut: 7075 Aluminum Type 3 Class 2 Hard Anodized Clear (Bronze finish) Barrel Nut Wrench Included No Barrel Nut Shims Required for Installation 17-4PH Cored Stainless Steel Rail Mounting Attachment - Patent Pending by CMT (4) Anti Rotation QD Sling Sockets: (2) at front and (2) at rear. 3 o'clock & 9 o'lock Positions Tapped Hole at Front End for Optional Bipod/Sling Attache Point at 6 o'clock Postion No Contact with Gas Tube Compatible with most Low Profile Gas Blocks Internal diameter: 1.34" Rotation limited QD sockets Finish: Mil-Spec Type 3 Class 2 Hard-coat Anodized Made