PRO2A 8.5" .458 SOCOM Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit

Product Overview

The PRO2A 8.5" .458 SOCOM Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit balances massive big-bore kinetic impact with ultimate handling agility. Built around a short, precision-engineered 8.5-inch 4150 CMV barrel, this assembly extracts devastating close-quarters stopping power from the hard-hitting .458 SOCOM round. Incorporating a premium Non-Reciprocating (NR) side-charging handle for flat optical integration and paired with a custom linear muzzle flash can to redirect heavy concussive energy downrange, this complete upper drops seamlessly onto your mil-spec lower receiver framework.

Key Features

Ergonomic Non-Reciprocating Side Charger: Billet aluminum charging handle remains stationary during cycling sequences to completely eliminate mechanical face distractions and clear wide-body optics.
Blast-Directing Linear Flash Can: Forces large expanding muzzle gases and concussive pressure waves forward, protecting operators in close-quarters or indoor environments.
Enlarged Ejection Port Receiver: Factory-modified and enlarged ejection port optimized specifically to ensure flawless case ejection of large-bore .458 brass shells.
Rugged QPQ Melonite Barrel finish: Premium liquid nitride treatment hardens internal and external barrel surfaces for extended throat longevity and reliable weather resistance.
Independent Free-Float Harmonious Rail: Rigid, slim free-float M-LOK handguard shields optimal barrel harmonics from accuracy disruptions caused by heavy accessories or bipod loads.

Technical Specifications

Caliber / Chamber:	.458 SOCOM
Barrel Length:	8.5 Inches
Barrel Material:	4150 Chrome Moly Vanadium Steel
Twist Rate:	1:14 Right-Hand Twist Button Rifled
Barrel Finish:	QPQ Melonite / Black Nitride Finish
Gas System Length:	Pistol-Length Gas System Layout with 0.750" Low Profile Gas Block
Receiver Construction:	Gibbz Arms G4 Billet Aluminum Non-Reciprocating Side Charging Upper Architecture with Enlarged Ejection Port, Gen 2 Handle (Type III Hardcoat Anodized)
Bolt Carrier Group (BCG):	Premium M16 Profile BCG with Properly Hooked .458 SOCOM Bolt Face, Nitride Finish, MPI Tested, properly enhanced for side-charging interaction
Muzzle Threads & Device:	5/8x32 TPI; Premium Slimline Muzzle Blast Flash Can
Handguard Interface:	9 Inch Free-Float Ergonomic Slim M-LOK Rail System with Continuous Top Rail Layout
Lower Parts Kit (LPK):	Complete Mil-Spec Lower Parts Kit including crisp Single-Stage Fire Control Group (Trigger, Hammer, Springs), A2 Pistol Grip, and full pins/detent arrays
Blade Assembly:	Pistol Stabilizing Blade Assembly complete with Pistol Buffer Tube, Carbine Recoil 3oz Buffer, Spring, Castle Nut, and End Plate
Manufacturing Origin:	100% Made in the USA

Why Choose This Product?

This premium 8.5-inch .458 SOCOM conversion kit represents the ultimate close-quarters personal defense setup for builders demanding heavy caliber stopping power without sacrificing smooth weapon kinematics. Shifting weapon manipulation to a left-side non-reciprocating handle ensures manual charging remains fast and entirely unhindered by low-profile reflex sights or heavy optic mounts. Tuned on a balanced pistol-length port and featuring an enlarged ejection port upper to eliminate cycling bottlenecks, this complete system offers maximum big-bore precision inside a lightweight, highly maneuverable platform.