CMMG Zeroed 30K SpecificationsManufacturer: CMMGModel: Zeroed 30KCaliber Rating: .22 ARC, .300 BLK, .308 Win, 4.6x30mm, 5.56x45mm, 5.7x28mm, 6.5 Creedmoor, 6.5 Grendel, 6mm ARC, 7.62x39mmMount Type: Direct Thread / HUBThread Pitch Included: 1/2"-28, 5/8"-24Diameter: 1.58 inchesFinish: NitrideWeight: 14.6 oz with mountWeight Without Mount: 12.4 ozLength: 5.5 inchesLength Without Mount: 5.2 inchesMinimum Barrel Length 300 BLK: 6.5 inchesMinimum Barrel Length .308 Win: 12.5 inchesMinimum Barrel Length 300 Win Mag: 20 inchesIncluded Accessories: Suppressor, 1/2"-28 Direct Thread HUB Mount, 5/8"-24 Direct Thread HUB Mount