FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut Black 8.5 in. The proprietary barrel nut is machined from steel and easily installs with standard 30MM box wrench. The free floated rail is machined from durable 6061-T6 aluminum and mounts to the barrel nut with eight high strength stainless steel screws for a secure and worry free fit. Specifications for FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut: Manufacturer: FM Products Color: Black Finish: Mil-Spec Hard-coat Anodized Black Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Gun Rail: Picatinny Condition: New Included Accessories: Barrel Nut Mount Type: M-LOK Quantity: 1 Features of FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut M-LOK compatible at 3 6 and 9 o'clock positions for lights grips bi-pods and other accessories; Single piece free float design that is lightweight and durable; Machined from 6061-T6 aluminum; Mil-Spec hard-coat anodized black; Ultra Light and slim profile for increased ergonomics and comfort; Includes proprietary barrel nut; Full length picatinny top rail; Barrel nut requires 1 3/16 wrench (30 MM); M-Lok compatible slots on 7 sides tons of real estate to mount accessories where you want them Package Contents: FM Products Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut FM Products FM-HG8.5: Gen 2 Ultra Light Free Float AR15 M-Lok Handguard w/ Barrel Nut Black 8.5 in