The Combat Armory CA-15 Pistol in 300 Blackout (brand part no. CA15.10SR.300P10) is a Mil-Spec AR-15 pistol built from billet 7075-T6 aluminum upper and lower receivers, hard-coat anodized black. It pairs a compact 10.5-inch chrome-moly-vanadium barrel with a slim 10-inch free-float M-LOK handguard and a pistol buffer tube, no shoulder stock, keeping it a Title I firearm outside NFA regulation. Among AR pistols, the CA-15 gives 300 Blackout shooters a compact, maneuverable build for home defense or the range.

Key Specifications

• The chambering is 300 Blackout.
• The barrel length is 10.5 inches.
• The barrel material is 4140 chrome-moly-vanadium steel for strength under sustained fire.
• The barrel finish is Melonite, adding corrosion and wear resistance to the bore.
• The barrel profile is M4 with M4 feed ramps for reliable feeding.
• The gas system is carbine length with a 0.750-inch low-profile gas block.
• The muzzle device is an A2 flash hider threaded 1/2×28.
• The upper and lower receivers are billet 7075-T6 aluminum with Type III hard-coat anodizing.
• The handguard is a 10-inch free-float M-LOK slim rail.
• The buffer tube is a pistol tube, with no stock attached, and it ships with a 10-round magazine compatible with 5.56/.223 magazine bodies.

Frequently Asked Questions

Is this pistol an NFA item? No, as sold it uses a pistol buffer tube with no shoulder stock, which keeps it a standard Title I firearm. Adding a shoulder stock would legally make it a short-barreled rifle, requiring ATF Form 1 registration.

What magazines does it use? It ships with one 10-round magazine and accepts standard 5.56/.223-pattern AR-15 magazines, which also feed 300 Blackout.

What twist rate does this barrel use? The CA-15 300 Blackout uses a 1:7 twist rate, suited to a wide range of bullet weights in this caliber.

Buy the Combat Armory CA-15 300 Blackout Pistol

A compact, Mil-Spec 300 Blackout AR pistol with a corrosion-resistant Melonite barrel is exactly what the CA-15 delivers. Order from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.