This item is "new in box", never previously sold to a consumer, never fired (except possibly by the manufacturer), and carries a factory warranty. Manufacturer: CMMG Model: Resolute MK4 Limited Caliber: 5.56 Barrel Length: 16.1" Twist Rate: 1:07 Overall Length: 32.5" Finish: FDE Battleworn Grips: Magpul MOE Sights: Flat top Magazine Capacity: 30