LaRue Tactical Complete AR-15 Match Grade Upper Receiver 16in 5.56x45mm NATO 1-8 Twist A2 Flash Hider Black. 56 LaRue Upper Its widely-recognized that were crafting the most accurate rifles on the planet. But if youve got any other type of AR-15 you can buy and drop this LaRue upper on your any-brand AR-15 lower toss on a magnified scope use match ammo or your own handloads and easily shoot under 1-inch groups at 100 yards. Specifications for LaRue Tactical Complete AR-15 Match Grade 16in 5.56x45mm Upper Receiver: Manufacturer: LaRue Tactical Caliber: 5.56x45mm NATO Overall Length: 24.5 in Barrel Length: 16 in Barrel Profile: Standard Gas System Length: Mid Length Barrel Twist Rate: 1-8 Threads per Inch: 1/2x28 Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: AR-15 Condition: New Fabric/Material: Aluminum Gas Block Journal Size-Diameter: .750 in Handguard Length: 13 in Gun Rail: Picatinny Gun Make: AR Platform Magazine Included: No Package Contents: LaRue Tactical Complete AR-15 Match Grade 16in 5.56x45mm Upper Receiver What firearm models does the manufacturer say LaRue Tactical Complete AR-15 Match Grade 16in 5.56x45mm Upper Receiver is compatible with? The manufacturer suggests that LaRue Tactical Complete AR-15 Match Grade 16in 5.56x45mm Upper Receiver is compatible with AR-15LaRue Tactical LT-015: Complete AR-15 Match Grade Upper Receiver 16in 5.56x45mm NATO 1-8 Twist A2 Flash Hider Black