The Combat Armory CA-15 300 Blackout pistol (brand part no. CA15.10FR.300P) is a complete AR-pattern pistol built to Mil-Spec dimensions from billet 7075-T6 aluminum upper and lower receivers, hard-coat anodized black. Combat Armory chambers the 10.5-inch, 4140 chrome-moly-vanadium barrel in 300 Blackout, a cartridge purpose-built for short-barrel platforms and suppressed use, then wraps it in a free-float M-LOK handguard that runs the full length of the barrel. A carbine-length gas system, A2 flash hider, and low-profile gas block keep the pistol cycling reliably, while Mil-Spec fire control and charging components mean parts compatibility with the wider AR-15 ecosystem.

Key Specifications

• Chambered in 300 Blackout, with a 30-round magazine included.
• The 10.5-inch barrel is 4140 chrome-moly-vanadium steel with a melonite finish.
• The gas system is carbine length with a .750 low-profile gas block.
• A 10-inch free-float M-LOK handguard covers the barrel for mounting accessories.
• Upper and lower receivers are billet 7075-T6 aluminum with Type III hard-coat anodizing.
• The muzzle wears an A2 flash hider.
• The safety selector is Mil-Spec, ambidextrous style.
• The barrel extension uses M4 feed ramps for reliable feeding.
• The buffer system uses a pistol-length buffer tube, keeping the gun classified as a pistol.

Frequently Asked Questions

Why choose 300 Blackout for a short-barrel pistol? 300 Blackout is designed to run efficiently out of short barrels, unlike 5.56mm which loses more velocity as barrel length drops.

What magazine capacity does it ship with? A 30-round magazine is included.

Is this pistol built to Mil-Spec dimensions? Yes, all major components follow Mil-Spec dimensions for parts compatibility.

Buy the Combat Armory CA-15 300 Blackout Pistol

A short 10.5-inch barrel chambered in a cartridge built for it makes this Combat Armory CA-15 a strong 300 Blackout pistol foundation. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more of our AR pistols.