Convert your stripped lower receiver into a hard-hitting sub-gun with the PRO2A 7.5" 45 ACP Complete Pistol Build Kit. Specially bundled to streamline your custom assembly project, this comprehensive package includes a professional-grade 7.5-inch upper receiver assembly paired with a premium **45 ACP Blowback Bolt Carrier Group (BCG)**, a **Complete Lower Parts Kit (LPK)**, and a rock-solid **Pistol Stabilizing Blade Assembly**. Squeezing peak close-quarters ballistics out of the legendary large-bore .45 Auto cartridge, this kit eliminates cross-brand tolerance issues and ensures a perfectly balanced direct blowback operating system straight out of the box.

Technical Product Specifications:

• Caliber: .45 ACP (Automatic Colt Pistol)
• Operating System: Dedicated Direct Blowback (Requires no complex gas block or gas tube machinery)
• Upper Receiver Style: Gibbz Arms G9 Non-Reciprocating (NR) Left-Side Charging, Billet Aluminum, Anodized Black (Billet handle remains locked forward while live firing)
• Barrel Length: 7.5 Inches
• Barrel Twist Rate: 1:16 Twist (Precision engineered to stabilize heavy-grain large-bore projectiles)
• Barrel Material & Finish: 4150 Chrome Moly Vanadium Steel treated with a slick Melonite / Nitride Finish
• Bolt Carrier Group (BCG): Premium .45 ACP heavy blowback ramped bolt assembly, compatible with large-frame Glock pattern magazines, featuring an integrated heavy-duty extractor
• Handguard: 9 inch Free-Float M-LOK rail providing an ultra-slim profile and structural rigidity
• Muzzle Device: 5/8-24 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, dimpled pistol buffer tube, heavy-weight recoil spring, dedicated AR-45 extra-heavy 8oz buffer, castle nut, and receiver endplate
• Platform Compatibility: Pairs with dedicated large-frame .45 ACP AR lower receivers (Glock style)
• Manufacturing: 100% Made in the USA

Key Product Features:

• Stationary Left-Side Charging: The side handle remains locked forward during live-fire operation, preserving physical clearance for support hands, weapon lights, optic mounts, or structural barricades.
• All-In-One Parts Syncing: Removes frustrating build friction by bundling matching fire controls, lower pins, an extra-heavy blowback buffer, and tracking components in one unified configuration.
• Big-Bore Feed Optimization: Features custom-contoured, hand-polished internal feed ramp geometry specifically engineered to cycle wide 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.

Why Choose the Pro2A Tactical 7.5" 45 ACP NR Side Charging Full Build Kit?

Bypassing Assembly Guesswork

Building an AR-45 big-bore platform from individual pieces often leads to cycling headaches, primarily due to mismatching bolt masses and proper buffer system weighting. Pro2A Tactical tames this problem by tuning the entire cycle window for you. This full package balances our **Premium .45 ACP Upper** with a dedicated **Heavy Blowback Bolt** and an exact-fit **Extra-Heavy Pistol Buffer System**, giving you a machine that runs smoothly right off your assembly bench.

Uncompromised Mechanical Leverage

Manipulating a standard rear charging handle below modern red dots or optics on a compact build can be clumsy and slow. Our left-side side charging mechanism moves your primary weapon controls directly above your support hand, allowing you to cycle the action or inspect the chamber quickly while maintaining downrange sight alignment.

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 moisture, humidity, and corrosive carbon buildup.

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, at the range, or in the field.