Combine maximum straight-walled thumbing power with a modernized manual interface using the PRO2A 7.5" 450 Bushmaster Non-Reciprocating Side Charging Upper Receiver Group. Completely assembled, correctly headspaced , this compact upper replaces the awkward rear charging configuration with a seamless side mechanical action. Featuring a specialized 1/24 twist barrel and rugged Melonite protection, it provides absolute functional authority for close-range hunting, dense brush navigation, and specialized defensive builds.
Key Features
- Modern Non-Reciprocating Side Control: The side charging handle stays completely locked and stationary while cycling, keeping the operator's line of sight uninterrupted by moving parts.
- Melonite (QPQ) Hardened Surface: Delivers a highly slick, ultra-hard interior bore layer that dramatically enhances cleaning efficiency, resists abrasive friction, and wards off rust.
- Compact Maneuverability Profile: The concise 7.5-inch barrel structure provides rapid swinging movement and tracking inside dense blinds, tight thickets, or close defense spaces.
- Rigid M-LOK Attaching Flexibility: Grants plenty of modular mounting solutions at the 3, 6, and 9 o'clock index marks to anchor handstops, accessories, or rail panels smoothly.
- Professional Grade Bench Inspections: Hand-built with thorough checking for barrel extension-to-receiver concentricity, gas port uniformity, and absolute headspace tolerance limits.
Technical Product Specifications
- Caliber / Chamber: .450 Bushmaster
- Barrel Length: 7.5 Inches
- Gas System Length: Pistol-Length (tuned for optimized cycling metrics with big-bore pressures)
- Barrel Twist Rate: 1/24 Twist (optimized to stabilize standard heavy-grain 450 projectiles)
- Barrel Finish & Treatment: 4150 Chrome Moly Vanadium with an advanced slick Melonite / Black Nitride QPQ layer
- Upper Receiver: Gibbz Arms G4 Billet Aluminum Non-Reciprocating (NR) Left-Side Charging / Right-Side Ejection, Anodized Black
- Handguard Assembly: 7 Inch Free-Float Slim M-LOK Handguard featuring a matching full-length top Picatinny rail
- Gas Block Diameter: 0.750" Low-Profile Gas Block
- Muzzle Thread Pattern: 5/8x24 TPI Big Bore A2 Flash Hider
- Platform Compatibility: Fits standard AR-15 lower configurations
- Manufacturing: 100% Proudly Made in the USA from domestic raw components
Why Choose the Pro2A Tactical 7.5" 450 Bushmaster NR Upper?
Uncompromising Big-Bore Ergonomics
Manipulating a traditional rear T-handle charging device under stress or around large, low-hanging magnification hunting optics can be clumsy. Shifting to a left-side, non-reciprocating side-charging handling mechanism keeps your shooting hand firmly wrapped on the fire controls while your support hand swiftly operates or clears the action from a natural position.
Tuned for High Impact Close-Range Performance
The .450 Bushmaster relies on substantial mass deployment to stop large targets or medium game in their tracks. Putting this heavy-payload capacity into an agile 7.5-inch platform allows you to deploy immense short-range stopping authority inside a compact weapon system that is light, well-balanced, and highly portable.
True American Assembly Sourcing and Lifetime Support
Pro2A Tactical doesn't guess when assembling specialized platforms. Hand-built with meticulous attention to detail in Cumming, Georgia, this complete side-charging upper assembly is protected by a solid lifetime warranty against defects in materials or craftsmanship, ensuring lasting service down the road.
