Moriarti AR-15 5.56/.223 7.5in Pistol Shark Mlok Upper Assembly Black 16.5in. 56/.223 7.5in Pistol Shark Mlok Upper Assembly / Mlok Specifications for Moriarti AR-15 5.56/.223 7.5in Pistol Shark Mlok Upper Assembly: Manufacturer: Moriarti Caliber: 5.56mm Overall Length: 16.5 in Barrel Length: 7.5 in Barrel Profile: Government Gas System Length: Pistol Length Barrel Twist Rate: 1-7 Threads per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: Muzzle Brake Color: Black Fabric/Material: 4150 CMV Gas Block Journal Size-Diameter: .750 in Handguard Length: 7 in Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Rail: M-LOK Weight: 2.3 lb Condition: New Bolt Carrier Group Included: No Magazine Included: No Charging Handle Included: No Last Chance: Yes Mount Type: M-LOK Features of Moriarti AR-15 5.56/.223 7.5in Pistol Shark Mlok Upper Assembly Shark Muzzle Brake 7" Mlok Diamond Cut Design Package Contents: Moriarti AR-15 5.56/.223 7.5in Pistol Shark Mlok Upper Assembly Moriarti MAR-7-556-SHARK: AR-15 5.56/.223 7.5in Pistol Shark Mlok Upper Assembly Black 16.5in