Convert your stripped lower receiver into a highly maneuverable, ultra-reliable sub-gun with the PRO2A 5" 9mm Complete Pistol Build Kit. Specially bundled to streamline your custom assembly project, this comprehensive package includes a professional-grade 5-inch upper receiver assembly paired with a premium **9mm Blowback Bolt Carrier Group (BCG)**, a **Complete Lower Parts Kit (LPK)**, and a rock-solid **Pistol Stabilizing Blade Assembly**. By sourcing every core performance part in a single engineered layout, you eliminate cross-brand tolerance issues and ensure a perfectly balanced direct blowback operating system from day one.

Technical Product Specifications:

• Caliber: 9mm Luger (9x19mm)
• Operating System: Dedicated Direct Blowback (Requires no complex gas block or gas tube machinery)
• Barrel Length: 5 Inches (Micro/Pistol Length Profile)
• Barrel Twist Rate: 1:10 Twist (Precision engineered to stabilize a wide array of grain weights)
• Barrel Material & Finish: 4150 Chrome Moly Vanadium Steel treated with a slick Melonite / Nitride QPQ defensive shield
• Bolt Carrier Group (BCG): Premium 9mm heavy blowback ramped bolt assembly, compatible with Glock and Colt magazines, features an integrated heavy-duty extractor
• Charging Handle: Standard Milspec Charging Handle
• Handguard: 7 inch Free-Float M-LOK rail providing an ultra-slim profile and structural rigidity
• Muzzle Device: 1/2-28 Slimline Flash Can (Directs expanding high-pressure gases and muzzle flash straight downrange)
• Lower Parts Kit (LPK): Complete Mil-Spec assembly including single-stage trigger, hammer, safety selector, pins, springs, and an ergonomic polymer A2 pistol grip
• Pistol Blade Assembly: High-strength impact-resistant stabilizing polymer blade, pistol buffer tube, heavy-weight 9mm buffer spring, dedicated 9mm 8oz heavy buffer, castle nut, and receiver endplate
• Platform Compatibility: Pairs with dedicated 9mm AR lower receivers (Glock or Colt pattern) or standard multi-caliber lowers utilizing 9mm conversion magblock inserts
• Manufacturing: 100% Made in the USA

Key Product Features:

• All-In-One Parts Syncing: Removes frustrating build friction by bundling matching fire controls, recoil springs, heavy blowback buffers, and tracking components in one unified kit.
• Pistol Caliber Feed Optimization: Engineered with geometry-tuned internal barrel extensions to cycle modern hollow points and flat-nosed training ammunition flawlessly without failure-to-feed bottlenecks.
• Linear Concussion Shielding: Tipped with a forward-blast flash can that drives heavy expansion muzzle gases straight down the line of fire, minimizing operator fatigue.
• Recoil Mitigating Weighting: Included buffer group features an augmented heavy 9mm physical weight configuration to properly slow down direct blowback bolt cycle speeds, preserving internal lower components.

Why Choose the Pro2A Tactical 5" 9mm Complete Build Kit?

Bypassing Assembly Guesswork

Building an AR-9 pistol caliber platform from individual pieces often leads to cycling headaches, primarily due to mismatching bolt masses and buffer weights. Pro2A Tactical tames this problem by tuning the entire cycle window for you. This full package balances our **Premium 9mm Upper** with a dedicated **Heavy Blowback Bolt** and an exact-fit **Heavy 9mm Pistol Buffer System**, giving you a machine that runs smoothly right off your assembly bench.

Taming Short-Barrel Pistol Concussion

Running a micro 5-inch barrel setup often yields aggressive lateral blast pressure. Our integrated **Flash Can** acts as a directional force multiplier, catching those expanding powder gases and projecting them forward. This dramatically improves overall shooter comfort, making it a much cleaner experience when training at indoor ranges or working tight close-quarter environments.

Melonite Protected Core for Lifetime Field Durability

The premium 4150 CMV barrel is treated inside and out with an ultra-hard **Melonite (QPQ) finish**. This liquid-nitride treatment seals the pore structure of the steel, exponentially reducing bore wear from high-volume shooting and providing top-tier protection against hunting camp humidity, rain, and field moisture.

Sourced From Premium Domestic Partners

We believe in total transparency. That is why we proudly disclose that we source our barrels, rugged handguards, and raw receiver materials from elite US manufacturers like Hitman Industries, Kak Industry, and Bowden Tactical. You always know exactly what quality components are backing your investment.

Lifetime Warranty and Support

Every Pro2A Tactical manufactured component group is backed by a comprehensive **Lifetime Warranty** against defects in materials or workmanship to the original purchaser, giving you total peace of mind on the bench or in the backcountry.