PRO2A 8.5" 458 Socom 1/14 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can
Massive Big-Bore Firepower with Advanced Blast Control and Ergonomics
Bring devastating big-bore kinetic performance to a highly compact layout with the PRO2A 8.5" .458 SOCOM Non-Reciprocating (NR) Side Charging M-LOK Upper Receiver Group. Precision-engineered to conquer feeding and manual action bottlenecks, this complete premium upper drops directly onto any standard Mil-Spec AR-15 lower receiver. By moving the cocking mechanism to a stationary left-side charging handle, it eliminates structural interference with large optics, red dots, or thermal scopes. Outfitted with an integrated blast-forward Flash Can tucked neatly inside a modular free-float rail, this package forces intense concussive gases directly downrange away from the operator for smooth, comfortable performance.
Key Features:
- Non-Reciprocating Side Charging Action: The ergonomic left-side handle remains completely stationary while the weapon fires, protecting your support hand and allowing manual manipulation without breaking your sight picture.
- Blast-Forward Linear Flash Can: Pre-installed muzzle device redirects intense short-barrel gas expansions, sound waves, and concussive reports directly downrange—maximizing comfort during close-quarters operation.
- Enlarged Ejection Port Cutout: Specially widened receiver port ensures clean, reliable clearance of heavy .458 SOCOM brass casings, eliminating stovepipe cycling failures.
- Advanced Melonite Barrel Treatment: The premium 4150 CMV steel barrel is fully treated with an advanced Salt Bath Melonite finish inside the bore and across the exterior to extend erosion service life and maximize corrosion resistance.
- Hand-Polished Single Feed Ramp: Custom, widened single feed ramp geometry eliminates common friction and bullet nose drag associated with single-stack big-bore magazines.
- Sleek Tucked Handguard Style: A free-float aluminum M-LOK handguard surrounds the base of the flash can, offering a continuous top Picatinny axis for accessories and modular M-LOK spacing for tactical gear.
Technical Product Specifications:
| Upper Receiver Assembly | Gibbz Arms G4 Premium Non-Reciprocating Side Charging Billet Upper Receiver, Custom Enlarged Ejection Port, Type III Hardcoat Anodized Black Finish |
|---|---|
| Charging Handle | Left-Side Non-Reciprocating Charging Handle Assembly (Stationary During Firing Cycle) |
| Barrel Component | 8.5 Inch Profile, 4150 Chrome Moly Vanadium (CMV) Steel, Medium Contour Profile, Melonite Treated Interior & Exterior Bore |
| Caliber | .458 SOCOM |
| Twist Rate | 1:14 Twist |
| Gas Operating Block & System | Pistol-Length Gas System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device Component | Standard 5/8x24 Thread Pitch, Extended Blast-Forward Linear Flash Can Pre-Installed |
| Handguard Rail | 9 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Alignment, Modular M-LOK Attachment Points (Muzzle Device Tucked) |
| Manufacturing Origin | 100% Assembled and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty |
Why Choose the PRO2A .458 SOCOM Flash Can Upper?
Short-barreled big-bore conversions on standard rear-charging AR receivers frequently trap shooters with violent side concussion and awkward optics manipulation. The PRO2A 8.5" .458 SOCOM Non-Reciprocating Side Charging Upper with Flash Can directly solves these vulnerabilities. By integrating a widened ejection port with a smooth left-side manual cocking mechanism, you can effortlessly run the bolt without breaking your cheek weld or moving your hands out of ready position. Furthermore, tucking the linear flash can inside the free-float M-LOK handguard keeps the platform exceptionally compact while safely driving massive blast pressures away from your face. Hand-built, properly headspaced, and quality-tested in the USA, this upper upgrade gives you immense kinetic capability in a flat-shooting, highly civilized build.
