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Colt's Manufacturing, M4-CR6920, Semi-automatic, 223 Rem/556NATO, 16.1"M4 Profile Barrel, Flash Hider, Matte Black Finish, 4 Position Collapsible Stock, Magpul Backup Flip Sight, 30Rd, 1 Magazine, Does Not Have LE Rollmarks Product Specifications UPC Code: 098289023513 Manufacturer: Colt's Manufacturing Model: 6920 Action: Semi-automatic Type: AR Caliber: 223 Rem Caliber: 556NATO Barrel Length: 16.1" Finish/Color: Matte Grips/Stock: 4 Position Collapsible Accessories: 1 Mag Type of Barrel: M4 with Flash Hider Capacity: 30Rd Sights: Magpul Backup Flip Sight Manufacturer Part #: 6920