LaRue Tactical Complete Match Grade Upper Receiver 22in 6.5 Creedmoor 1-8 Twist A2 Flash Hider Black. NOTE: Only compatible with LaRue pattern AR-10 lowers Specifications for LaRue Tactical Complete Match Grade 22in 6.5 Creedmoor Upper Receiver: Manufacturer: LaRue Tactical Caliber: 6.5mm Creedmoor Overall Length: 32 in Barrel Length: 22 in Barrel Profile: Standard Gas System Length: Extended Length Barrel Twist Rate: 1-8 Threads per Inch: 5/8x24 Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: AR-10 Condition: New Fabric/Material: Aluminum Gas Block Journal Size-Diameter: .750 in Handguard Length: 14.5 in Gun Rail: Picatinny Gun Make: AR Platform Magazine Included: No Last Chance: Yes Package Contents: LaRue Tactical Complete Match Grade 22in 6.5 Creedmoor Upper Receiver What firearm models does the manufacturer say LaRue Tactical Complete Match Grade 22in 6.5 Creedmoor Upper Receiver is compatible with? The manufacturer suggests that LaRue Tactical Complete Match Grade 22in 6.5 Creedmoor Upper Receiver is compatible with AR-10LaRue Tactical LT-018: Complete Match Grade Upper Receiver 22in 6.5 Creedmoor 1-8 Twist A2 Flash Hider Black