TacFire 15in A.C.E Series M-Lok Free Float Handguard Black. C.E.) Series Handguard. Extruded from the highest grade of 6061-T6 aluminum reinforced with an impervious Class 2 Type III Black Hard Anodize per MIL-A-8625 Standards and specifications our M-Lok handguards are leading the firearms industry with cutting edge precision along with new era innovative deisgns. Freefloat Mlok Specifications for TacFire A.C.E Series M-Lok Free Float Handguard: Manufacturer: TacFire Color: Black Finish: MIL-A-8625F Type III Class 2 Hard Coat Anodized 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: 1018 Steel Barrel Nut Country of Origin: USA Quantity: 1 Features of TacFire A.C.E Series M-Lok Free Float Handguard 4/7/10/13.5/15 in M-Lok Inner dIiameter: 1.3in Outer diameter: 1.5in Gas block clearance width: 0.3in 6061-T6 Aluminum Class 2 type III hard anodized to MIL-A-8625 standarts 1018 steel barrel nut included Package Contents: TacFire A.C.E Series M-Lok Free Float Handguard Barrel Nut TacFire HG20-15: 15in A.C.E Series M-Lok Free Float Handguard Black