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Brenton USA Scout 18in 6mm ARC Upper Receiver. Specifications include Manufacturer Brenton USA, Caliber 6mm ARC, Overall Length 25.375 in, Barrel Length 18 in, Barrel Profile Medium Hunter, Gas System Length Mid Length, Barrel Twist Rate 1-7.5, Threads per Inch 5/8x24, Muzzle Device Thread Protector, Fabric/Material 7075 Aluminum, Gas Block Journal Size-Diameter 0.875 in, Handguard Length 13.25 in, Weight 4.52 lb, Barrel Material 416R Stainless Steel, Magazine Included Yes. Features: Receiver 7075-T6 Aircraft Grade Aluminum with Brenton Patent Pending RecevierLock, Handguard Brenton RealFeel, PolyCore, Charge Handle Gas diverting, BCG 8620 Carrier with 9310 Bolt with NiB protective coating, Lifetime Warranty, Sub MOA Guarantee, Package Contents Brenton USA Scout 18in 6mm ARC Upper Receiver.
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