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Achieve the ultimate balance between short-barrel maneuverability, weapon cycling reliability, and downrange blast mitigation. The PRO2A 11.5" 5.56 NATO Carbine-Length Melonite Upper with Flash Can Kit is a comprehensive tactical package that bundles a complete precision upper receiver assembly, a premium Mil-Spec bolt carrier group (BCG), an aluminum charging handle, a linear flash can muzzle device, a full lower parts kit, and an adjustable blade assembly. Engineered around a highly sought-after 11.5-inch 4150 CMV steel barrel treated with a hard Melonite finish, this kit provides a major step up in system pressure stability over standard 10.5-inch builds, while the recessed linear flash can pushes concussion forward. This complete bundle contains every premium internal and external component required to turn your stripped lower receiver into a highly accurate personal defense weapon (PDW). Proudly 100% designed, machined, and precision-tested in the USA.
| Upper Receiver | Mil-Spec Forged 7075-T6 Aluminum, M4 Feed Ramps, Type III Hardcoat Anodized Black Finish (Forward Assist & Ejection Port Cover Pre-Installed) |
|---|---|
| Bolt Carrier Group | Premium M16 Profile Mil-Spec BCG, Nitride/Melonite Finish, Gas Key Properly Staked |
| Charging Handle | Standard Mil-Spec Aluminum Charging Handle |
| Barrel Length & Steel | 11.5 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated |
| Caliber | 5.56 NATO (Compatible with .223 Remington ammunition) |
| Twist Rate | 1:7 Twist (Optimized to stabilize heavy duty 62gr, 69gr, and 77gr tactical loads) |
| Gas Operating Block | Carbine-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | Standard 1/2-28 Thread Pitch, Slimline Linear Flash Can Pre-Installed |
| Handguard | 12 Inch Free-Float M-LOK Rail, Slim Outer Profile, Machined from 6061-T6 Aluminum |
| Lower Parts Kit | Mil-Spec Polished Trigger & Hammer, Standard Pistol Grip, Lower Component Springs, and Pins Included |
| Brace | Standard Blade with pistol buffer tube, standard 3oz buffer, buffer spring, latch plate, and castle nut |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The PRO2A 11.5" 5.56 NATO Carbine Length Upper with Flash Can Kit solves the two primary engineering issues found in modern compact AR builds: weapon over-gassing and punishing muzzle blast. Short barrels under 16 inches are notoriously loud and release massive pressure waves sideways toward the shooter. By pairing an optimized 11.5-inch barrel with a linear flash can, this system controls the expanding gas expansion rate via a larger window of internal dwell time while projecting the physical concussion forward downrange. This choice significantly limits parts wear, tames diagnostic gas blowback, and dramatically improves shooter comfort when running under covered ranges or inside vehicles.
By opting for a complete build configuration rather than piecing your firearm together block-by-block, you guarantee that everything functions smoothly. Every component—from the custom-contoured barrel to the matching trigger components and weighted buffer system—is factory verified for seamless operation. Backed completely by Pro2A Tactical's signature Lifetime Factory Warranty and engineered with 100% American craftsmanship, this master kit allows you to deploy a premium, defensive-ready firearm with absolute building confidence.
| SKU | P2A556ACT12CAR115CAN-WLA-KIT |
|---|---|
| Barrel Length | 11.5 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
