PRO2A 10.5" .458 Socom 1/14 Pistol Length Melonite M-LOK AR-15 Upper Kit | Pro2A Tactical

PRO2A 10.5" .458 Socom 1/14 Pistol Length Melonite M-LOK AR-15 Upper Kit

Product Overview

The PRO2A 10.5" .458 Socom 1/14 Pistol Length Melonite M-LOK AR-15 Upper Kit introduces devastating, big-bore brush-hunting performance to the compact AR-15 platform. Built around a precision 10.5-inch 4150 CMV steel barrel chambered in the massive .458 SOCOM caliber, this complete conversion package transforms a standard lower receiver into an absolute powerhouse. Outfitted with an independent free-float M-LOK rail system to maintain optimal barrel harmonics and bundled with a specialized big-bore bolt carrier group, full lower parts, and a rugged stock assembly, this range-ready kit delivers incredible close-to-mid range stopping power.

Key Features

Devastating Big-Bore Caliber: Delivers massive close-to-mid range kinetic transfer, making it an elite choice for thick-brush hog hunting and home defense configurations.
Rugged Melonite Barrel Armor: Liquid QPQ Nitride treatment yields an exceptionally hard, low-friction bore and exterior surface for extended barrel longevity and superior element resilience.
Optimal 1/14 Twist Rate: Engineered specifically to stabilize heavy-grain projectiles uniformly, ensuring consistent trajectories with the caliber's most popular hunting and defensive loads.
Enlarged Ejection Port Receiver: Features a premium upper receiver with a factory-modified, enlarged ejection port designed to facilitate flawless feeding and case extraction sequences.
All-In-One Assembly Package: Ships fully bundled with a matching .458 SOCOM Bolt Carrier Group (BCG), slim free-float M-LOK handguard, complete lower build components tree, and stock assembly hardware.

Technical Specifications

Caliber / Chamber:	.458 SOCOM
Barrel Length:	10.5 Inches
Barrel Material:	4150 Chrome Moly Vanadium Steel
Twist Rate:	1:14 Right-Hand Twist Button Rifled
Barrel Coating Finish:	QPQ Melonite / Black Nitride Finish
Gas System Length:	Pistol-Length Gas System with 0.750" Low Profile Gas Block Layout
Upper Receiver Type:	7075-T6 Forged Aluminum with Enlarged Ejection Port, Forward Assist & Dust Cover (Type III Hardcoat Anodized)
Bolt Carrier Group (BCG):	Premium M16 Profile BCG with Properly Staked Gas Key .458 SOCOM Bolt Face, Nitride Finish, MPI Tested
Muzzle Threads & Device:	5/8x32 TPI; Premium Big-Bore A2 Flash Hider
Handguard Interface:	9 Inch Free-Float Ergonomic Slim M-LOK Rail System with Continuous Top Picatinny 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
Stock Assembly:	Adjustable Blade complete with Pistol Buffer Tube, Heavy Recoil Buffer, Spring, Castle Nut, and End Plate
Manufacturing Origin:	100% Made in the USA

Why Choose This Product?

This comprehensive conversion kit provides modern builders with an elite intermediate-chassis solution that transitions seamlessly into a hard-hitting, big-bore platform. By packaging a factory-modified, enlarged ejection port receiver with a specialized .458 bolt face group and a tuned pistol-length gas system, it completely eliminates cycling bottlenecks and ensures flawless extraction reliability with heavy hunting cartridges. Shipped complete with a robust Melonite-treated barrel and all required frame assembly pieces, this kit offers sub-MOA precision, maximum close-quarters maneuverability, and field-tested durability engineered for ultimate performance.

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