Build an ultra-modern, straight-walled hunting pistol or short-barreled rifle configuration with the PRO2A 12.5" 350 Legend Pistol Length NR Side Charging Upper Kit. This masterfully engineered, un-assembled bundle includes matching, high-tolerance components explicitly selected to optimize manual ergonomics and cycling behavior. By combining a 12.5-inch Melonite-treated barrel with a non-reciprocating side-charging receiver mechanism, an all-inclusive lower parts kit, and a stabilizing pistol blade assembly, this platform offers a streamlined, comfortable workbench build built for ultimate close-range authority.
Key Features
- Ergonomic Non-Reciprocating Side Charging: Shifting the controls from the traditional rear charging handle to a stationary left-side mechanism keeps your view clear and mechanics fluid under optics.
- Complete All-In-One Assembly Bundle: Eliminates tracking down independent components by packing your side-charging upper components, small lower internal parts, and stabilizing blade system in a single box.
- Robust Stabilizing Blade Configuration: Includes an ergonomic polymer pistol blade brace designed to provide reliable leverage, recoil management, and repeatable indexing.
- Melonite (QPQ) Hardened Coating: Establishes a diamond-hard, low-friction internal bore layer that resists early abrasive wear, actively fights off moisture, and simplifies carbon cleaning.
- Full Mil-Spec Lower Parts Kit: Every internal small part is machined out of heat-treated domestic steels to guarantee a crisp, predictable trigger break and continuous functional life.
Technical Product Specifications
- Caliber / Chamber: .350 Legend (Straight-Walled Cartridge Profile)
- Barrel Length: 12.5 Inches
- Gas System Length: Pistol-Length (calibrated for optimized internal backpressure with short-barreled straight-walled cases)
- Barrel Twist Rate: 1/16 Twist Button Rifled (optimized to cleanly stabilize 145 grain to 180 grain projectiles)
- Barrel Finish & Treatment: 4150 Chrome Moly Vanadium with an advanced slick Melonite / Black Nitride QPQ layer
- Upper Receiver Style: Gibbz Arms G4 Billet Aluminum Non-Reciprocating (NR) Left-Side Charging / Right-Side Ejection, Anodized Black
- Bolt Carrier Group:Premium Full Auto Profile, Nitride Finish, 9310 Bolt, 8620 Carrier, MPI Tested
- Handguard Structure:10 Inch Free-Float Slim M-LOK Handguard featuring a matching continuous top Picatinny rail
- Gas Block Diameter: 0.750" Low-Profile Gas Block and Stainless Steel Pistol Gas Tube
- Muzzle Thread Pattern: 5/8x24 TPI A2 Flash Hider, Enlarged to 35 Cal
- Lower Parts: Complete Mil-Spec lower assembly components (Trigger, Hammer, Disconnector, Safety Selector, Springs, Pins, Bolt Catch, Magazine Release, and Pistol Grip)
- Pistol Blade Assembly: High-density polymer Stabilizing Blade, Pistol Buffer Tube, Carbine Buffer Spring, Standard Buffer weight, Castle Nut, and Receiver End Plate
- Platform Compatibility: Pairs with standard AR-15 Mil-Spec lower structures (requires 350 Legend specific magazines or followers)
- Manufacturing Sourcing: 100% Sourced and Made in the USA from raw domestic materials
Why Choose the Pro2A Tactical 12.5" 350 Legend NR Side Charging Kit?
Elite Big-Bore Ergonomics in a Compact Package
The .350 Legend cartridge is a celebrated straight-walled hunting round, but cycling it in a short 12.5-inch package shouldn't force you into awkward hand placement. Traditional rear charging setups can be clumsy, especially when running low-profile optics or scoping large hunting glass. This left-side non-reciprocating side-charging platform lets you charge or clear the gun smoothly while keeping your shooting hand securely anchored on the fire control grips.
Seamless Assembly Continuity and Bench Consistency
Pro2A Tactical doesn't build kits with unbranded or unknown generic parts. Every single component—from the trigger assembly to the buffer springs and castle nuts—is curated from top-tier domestic manufacturers, assuring strict dimensional uniformity so your custom straight-walled project fits together flawlessly on the workbench.
True American Craftsmanship and Support
Every element in this kit is proudly manufactured right here in the USA. Hand-curated and supported by our domestic customer care team out of Cumming, Georgia, Pro2A Tactical ensures your custom firearm build is founded on a bedrock of premium, long-term reliability.*Click here to view our complete sourcing data, warranty criteria, and build safety guidelines.
