Combat Armory CA-15 Features The Combat Armory CA-15 is machined from billet 7075-T6 aluminum for both the upper and lower receivers hard-coat anodized to Type III standards for long-term durability against wear and corrosion. Chambered in 5.56mm the 16 inch barrel is built from 4140 chrome moly vanadium steel with a Melonite finish and an M4 feed ramp extension for reliable feeding. A 1:7 twist rate stabilizes the full range of common 5.56 bullet weights while the carbine-length gas system and .750 low profile gas block keep the action cycling smoothly. The 1/2x28 threaded muzzle ships with an A2 flash hider with room to add a muzzle brake or suppressor later. A 15 inch free-float M-LOK handguard with a full picatinny thin rail gives the shooter ample real estate for mounting lights optics and other accessories along the top and sides. Mil-spec components carry through the build from the forward assist and dust cover to the ambidextrous-style safety and standard charging handle ensuring compatibility with the broader AR-15 aftermarket. A pistol-length buffer tube and mil-spec fire control group round out a rifle built around widely available field-proven parts. This Combat Armory CA-15 ships with a 10-round magazine and is available for sale at GrabAGun for shooters who want a dependable mil-spec AR-15 at an accessible price. Combat Armory CA-15 Specifications Manufacturer: Combat Armory Model: CA-15 Action: Semi-Auto Caliber: 5.56mm Capacity: 10 Barrel Length: 16 Barrel Material: 4140 Chrome Moly Vanadium Barrel Profile: M4 Barrel Thread Pitch: 1/2x28 Chamber: 5.56mm Upper Receiver Material: Billet 7075 T6 Handguard Length: 15 Handguard Style: M-LOK Full Pic Thin Rail Lower Receiver Material: Billet 7075 T6 Safety: Mil-Spec Ambi Style Magazines Included: 1 Available At: GrabAGun