Description
Short-barreled 5.56 builds have a way of getting expensive fast, which is what makes the Combat Armory CA-15 pistol worth a look. This one arrives fully assembled with mil-spec components throughout, built on billet 7075-T6 upper and lower receivers with a Type III hard-coat anodized finish. That is the same aluminum grade found on duty-quality rifles, and it holds up to bumps, drops, and range abuse without complaint.
Barrel and Gas System on the CA-15 Pistol
The heart of this setup is a 10.5 inch M4-profile barrel machined from 4140 chrome moly vanadium steel with a Melonite finish inside and out for corrosion resistance and long service life. The 1:7 twist stabilizes heavier 5.56 loads, and M4 feed ramps keep feeding smooth when you run it hard. A carbine-length gas system paired with a .750 low profile gas block gives you reliable cycling from the shorter barrel, and the 1/2×28 threaded muzzle wears an A2 flash hider that swaps out easily if you have another device in mind.
A Slim M-LOK Handguard That Earns Its Keep
Up front you get a 10 inch free float slim profile handguard with M-LOK slots along the sides and bottom, plus a Picatinny rail up top that lines up with the receiver for optics, irons, or a laser. The thin profile makes a real difference on a pistol this size, giving your support hand a comfortable grip without adding bulk or weight. Lights and hand stops bolt right on wherever you want them.
Rounding Out the Combat Armory CA-15
Controls are familiar mil-spec fare with a nice bonus: the safety selector is ambidextrous, so left-handed folks are covered out of the box. A standard charging handle, forward assist, and dust cover round out the upper, and the pistol buffer tube is ready for the brace or setup of your choosing. One 30 round magazine ships with it, so you can head straight to the range. For truck gun duty, home defense, or just a fun compact range companion, the CA-15 covers the bases without cutting corners.
Key Specifications
- Caliber: 5.56 NATO
- Barrel Length: 10.5 inches
- Barrel Material: 4140 Chrome Moly Vanadium
- Barrel Finish: Melonite
- Barrel Profile: M4 with M4 feed ramps
- Twist Rate: 1:7
- Muzzle Thread / Device: 1/2×28, A2 flash hider
- Gas System: Carbine length, .750 low profile gas block
- Handguard: 10" free float slim M-LOK with Picatinny top rail
- Receivers: Billet 7075-T6 aluminum, Type III hard-coat anodized
- Safety: Mil-spec style ambidextrous selector
- Buffer Tube: Pistol tube
- Magazine Capacity: 30 rounds
- Manufacturer Part Number: CA15.10SR.556P
- UPC: 789091896432
- Shipping Weight: 7.1 lbs
What’s Included
- Combat Armory CA-15 5.56 pistol with 10.5" barrel
- One 30 round 5.56 magazine
Frequently Asked Questions
What gas system does the Combat Armory CA-15 pistol use?
It runs a carbine-length gas system with a .750 low profile gas block. That is a well-proven combination for a 10.5 inch 5.56 barrel and generally cycles reliably with common ammo. The low profile block also tucks neatly under the free float handguard.
Can I swap the muzzle device on the CA-15?
Yes. The barrel is threaded 1/2×28, which is the standard thread pitch for 5.56 AR platforms, and it ships with an A2 flash hider installed. Most aftermarket brakes, comps, and suppressor mounts in that thread pattern will screw right on.
Will the 1:7 twist rate handle heavier bullets?
It will. A 1:7 twist is the faster end of common AR twist rates and stabilizes heavier 62 to 77 grain loads well, which is helpful since shorter barrels benefit from heavier projectiles. It shoots lighter 55 grain range ammo just fine too.
Does the Combat Armory CA-15 come with a brace or stock?
No, it ships with a bare pistol buffer tube, so you can set it up how you like. It does include one 30 round magazine, and the receivers, barrel, and handguard come fully assembled and ready to go.





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