M4 CARB 5.56MM 16" QUAD RAIL FRONT & REAR FLIP SIGHTS Manufacturer Model Number: CR6940 Manufacturer: Colt Model: Law Enforcement Carbine Caliber: 223 Rem | 5.56 NATO Type: Rifle Item Type: Firearm Firearm / Accessory Action: Semi-Auto Firearm / Accessory Capacity: 20 + 1 Finish: Matte Black Sights: MAGPUL MBUS Stock Frame Grips: Collapsible / Folding Stock 6 Position Adjustable Magazine Quantity and Description: 1 20 rd. Weight: 5.95 lbs. Shipping Weight: 9.7 Feature: Quad Rail Feature: M4 Chromed Lined Barrel Optic Adjustable Objective: false Optic Reticle Illuminated: false