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Brenton USA Scout 18in 6mm ARC Upper Receiver. Caliber 6mm ARC. Overall length 25.375 in. Barrel length 18 in with a Medium Hunter profile and 1-7.5 twist, 5/8x24 threads, muzzle thread protector. Receiver is 7075-T6 aluminum with Brenton RecevierLock. Handguard length 13.25 in. Gas system Mid Length. Gas block journal diameter .875 in. Barrel material 416R stainless steel. Weight 4.52 lb. Magazine included: Yes. Features: Receiver 7075-T6 Aircraft Grade Aluminum with RecevierLock; BCG: 8620 Carrier with 9310 Bolt and NiB coating; Handguard: Brenton RealFeel PolyCore; Charge Handle: Gas diverting. Lifetime warranty and Sub MOA guarantee provided with suitable ammunition and optics.
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