Combat Armory CA-15 Features The Combat Armory CA-15 Pistol is built around a 10.5 4140 chrome moly vanadium barrel with a 1:7 twist rate a combination suited to a wide range of 5.56mm bullet weights. The barrel s melonite finish improves wear resistance and corrosion protection over a bare steel surface while the M4 feed ramps and M4 barrel extension aid feeding reliability. A pistol length gas system paired with a .750 low-profile gas block keeps the system compact without sacrificing cycling and the included A2 flash hider helps manage muzzle signature. The 1/2x28 threaded muzzle leaves room for further muzzle devices down the road. The billet 7075-T6 upper and lower receivers carry a Type III hard-coat anodized finish for long-term durability with MIL-STD fire control safety charging handle and forward assist components throughout. A 10 free-float M-LOK handguard sits atop a Picatinny rail for mounting optics and accessories while the pistol buffer tube keeps the overall package short and easy to maneuver. The CA-15 Pistol ships with one 5.56 10-round magazine ready to run. Built from mil-spec parts throughout the Combat Armory CA-15 Pistol is a complete ready-to-shoot AR pistol package for sale at GrabAGun. Combat Armory CA-15 Specifications Manufacturer: Combat Armory Model: CA-15 Type: AR Pistol Caliber: 5.56 Capacity: 10+1 Barrel Length: 10.5 Barrel Material: 4140 Chrome Moly Vanadium Barrel Finish: Melonite Twist Rate: 1:7 Muzzle Thread Pitch: 1/2x28 Muzzle Device: A2 Flash Hider Gas System: Pistol Length Handguard: 10 Free Float M-LOK Receiver Finish: Type III Hard-Coat Anodized Optics: Picatinny Rail Magazines Included: 1 Available At: GrabAGun