What's in the Box Colt M4 5.56 NATO Semi-Auto Pistol (1) 30-Round Magazine Cable Lock Owner's Manual The Colt M4 AR-15 pistol is a semi-automatic AR-platform handgun chambered in 5.56mm NATO, engineered to deliver duty-grade reliability in an ultra-compact, close-quarters footprint. This firearm incorporates a 10.3-inch chrome-lined, manganese-phosphate finished barrel with a 1:7" twist rate and an A2 flash hider, built onto mil-spec forged 7075-T6 aluminum upper and lower receivers with a matte black Type-III hardcoat anodized finish. Operating on a carbine-length direct gas impingement system, it comes equipped with a 9.5-inch Colt free-float handguard featuring Magpul M-LOK slots, an integrated full-length M1913 Picatinny top rail, a Magpul K2 grip, and an ambidextrous fire selector. The optimized defensive configuration is completed by an SB Tactical SBA5 pistol stabilizing brace riding on a 6-position mil-spec buffer tube receiver extension. The firearm typically ships with one 30-round Magpul PMAG, delivering an overall deployment capacity of 30+1. Firearm Specifications Manufacturer: Colt Model: M4 Caliber: 5.56 NATO Barrel Length Range: 10" to 10.99" Barrel Length: 10.30" Gun Platform: AR Style Capacity: 30+1 Max Capacity: 30 Action: Semi-Auto Overall Length: 26.80" - 29.30" Sights: None Barrel Finish: Black Phosphate Barrel Material: Steel Muzzle: A2 Birdcage Flash Hider Receiver Description: Picatinny Rail Receiver Material: Aluminum Receiver Finish: Black Anodized Stock Finish Group: Black Stock Material: Synthetic Stock Description: SB Tactical SBA5 Brace Stock Finish: Black Grips: Black Polymer Handguards: M-LOK Safety: Selector Switch Weight: 5.70 lbs