Manticore Arms M-LOK 15in AR-15 Rail Black. The Manticore Arms M-LOK Rail features M-LOK slots on the sides and underside and picatinny on top. The Manticore Arms 15in M-LOK Rail features a GEN II barrel nut that is lighter simpler and easier to install Just torque to the recommend barrel nut torque setting slide rail over and install 8 set screws and you are done No need to time barrel nut or align threaded holes plus a cleaner look The Manticore Arms 15in Aluminum Free Float Rail system works with all gas system lengths (carbine midlength rifle). Specifications for Manticore Arms 15in M-LOK Rail for AR-15: Manufacturer: Manticore Arms Color: Black Finish: Milspec Type III Black hardcoat anodizing Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Length: 15 in Gun Rail: M-LOK Gas System Length: Rifle Length Weight: 9.9 oz Included Accessories: M-LOK Rail Barrel Nut Barrel Nut Wrench all hardware allen wrenches instruction sheet Quantity: 1 Features of Manticore Arms 15in M-LOK Rail for AR-15 AR-15 Aluminum Free Float rail system with M-LOK slots on sides and underside picatinny on top. Dimensions: 15in length 1.5in exterior width 1.09in interior clear width Weight: 8.4 ounces for rail 1.5 ounces for barrel nut Weight installed: 9.9 ounces (only adds 7.4 ounces as original barrel nut is removed) Barrel nut material and finish: 60616061 T6 aluminum with Milspec Type III Black hardcoat anodizing Rail material and finish: 6061 T6 aluminum with Milspec Type III Black hardcoat anodizing Panel material and finish: 6061 black anodized aluminum and proprietary polymer Ships with M-LOK Rail Barrel Nut Barrel Nut Wrench all hardware allen wrenches and instruction sheet The Manticore GEN II barrel nut design is lighter simpler and easier to install Just torque to the recommend barrel nut torque setting slide rail over and install 8 set screws and you are done No need to time barrel nut or align threaded holes plus a cleaner look Clears low profile gas blocks and works with all gas system lengths (carbine midlength rifle) Package Contents: Manticore Arms 15in M-LOK Rail for AR-15 Manticore Arms MA-24350: M-LOK 15in AR-15 Rail Black