Combat Armory CA-15 Features Performance is built around a 7.5 inch 4140 chrome moly vanadium barrel with a Melonite finish and M4 feed ramps chambered in 5.56 NATO with a 1 in 7 twist to stabilize the full range of loads for the cartridge. A pistol length gas system paired with a .750 low profile gas block keeps the action cycling reliably in the compact platform and an A2 flash hider caps the muzzle threaded 1/2x28 for further muzzle device options. The upper follows M4 MIL-STD dimensions with a Mil-Spec forward assist dust cover and charging handle. For shooters who want a genuinely Mil-Spec compatible AR pistol this build delivers. Construction and ergonomics are handled with the same attention to standards. Billet 7075-T6 upper and lower receivers are finished in Type III anodizing for a durable hard coat black finish while a 7 inch free float M-LOK handguard offers a thin rail profile for a comfortable grip and generous accessory mounting. The lower houses a Mil-Spec safety and fire control group on a pistol buffer tube and the pistol ships with a 30 round 5.56 magazine. For builders and shooters who want a fully assembled standards compliant AR pistol this configuration is purpose built. Combat Armory has built its reputation on complete Mil-Spec compatible AR platforms that deliver genuine parts compatibility at an accessible price. The Combat Armory CA-15 in 5.56 NATO carries that value proposition into a ready to run fully finished pistol for sale at GrabAGun. For shooters seeking a complete standards based AR pistol this build is a compelling choice. Combat Armory CA-15 Specifications Manufacturer: Combat Armory Model: CA-15 Type: AR-15 Pistol Caliber: 5.56 NATO Barrel Length: 7.5 inches Barrel Material: 4140 Chrome Moly Vanadium Barrel Finish: Melonite Barrel Profile: M4 Thread Pattern: 1/2x28 Twist: 1 in 7 Barrel Extension: M4 Feed Ramps Gas System: Pistol Length Gas Block: .750 Low Profile Muzzle Device: A2 Flash Hider Upper Receiver Material: Billet 7075-T6 Upper Receiver Style: M4 MIL-STD Upper Receiver Finish: Type III Anodizing Forward Assist: MIL-STD Dust Cover: MIL-STD Handguard Type: Free Float Handguard Style: M-LOK Thin Rail Handguard Length: 7 inches Charging Handle: MIL-STD Lower Receiver Material: Billet 7075-T6 Lower Receiver Finish: Type III Anodizing Safety: MIL-STD Fire Control Group: MIL-STD Buffer Tube: Pistol Tube Magazine: 5.56 30 Round Color: Black Available At: GrabAGun