PRO2A 7.5" 7.62x39 Pistol Length Melonite AR-15 Upper Kit | Complete Package

PRO2A 7.5" 7.62x39 1/10 Pistol Length Melonite AR-15 Upper Kit

Bring the hard-hitting power of the classic 7.62x39mm cartridge to an ultra-compact footprint with the PRO2A 7.5" Pistol Length Melonite M-LOK Upper Kit. This 100% American-made master build bundle contains every critical component required to transform a standard stripped lower receiver into a highly accurate, heavy-hitting tactical asset. Engineered to eliminate the classic ignition and feeding hurdles associated with this caliber on the AR platform, the kit pairs a rugged 4150 CMV steel barrel with a premium forged upper. Complete with a pre-headspaced bolt carrier group containing an enhanced firing pin, a full mil-spec lower parts kit (LPK), and a matching pistol buffer tube assembly, this package offers uncompromised close-quarters authority.

Key Features

All-In-One Master Rifle Package: Eliminates technical build guesswork by packaging the upper assembly, a pre-headspaced BCG, a complete lower internal hardware kit, and a matching buffer extension group together.
Enhanced Ignition Reliability: Includes a premium M16-profile bolt carrier group specifically tailored for the 7.62x39mm round, utilizing an enhanced (extended) firing pin and a tailored bolt face to guarantee reliable primer detonation on hard steel-cased surplus military ammunition.
Advanced Melonite Barrel Protection: The heavy-duty 4150 Chrome Moly Vanadium steel barrel is fully treated with an advanced Salt Bath Melonite finish inside the bore and across the exterior to extend operational service life and maximize corrosion resistance against corrosive primers.
Optimal 1:10 Twist Rate: Precision button-rifled with an optimized 1:10 twist configuration engineered specifically to stabilize standard 122gr, 123gr, and heavier variant 7.62x39mm bullets with pinpoint short-to-medium range accuracy.
Reliable Pistol-Length Gas Dynamics: Precision engineered to provide consistent internal cycling pressures, minimizing harsh gas port erosion while driving fluid extractions on steel or brass casings.
Slim Profile Free-Float M-LOK Rail: Machined from high-strength aluminum, the lightweight handguard isolates barrel vibrations to preserve uniform mechanical accuracy while providing a continuous top rail and modular M-LOK spacing.

Technical Specifications

Upper Receiver Assembly	Mil-Spec Forged 7075-T6 Aluminum, M4 Feed Ramps, Forward Assist & Port Cover, Type III Hardcoat Anodized Black Finish
Bolt Carrier Group	Full M16 Profile, Heavy-Duty Steel Bolt Face, Nitride/Melonite Finish, Heavy Duty Carrier, Properly Staked Gas Key, Enhanced Firing Pin for Steel-Cased Ammunition, Correct 7.62x39mm Bolt Face
Charging Handle	Standard Mil-Spec Charging Handle Assembly
Barrel Length & Steel	7.5 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated Interior & Exterior Bore
Caliber	7.62x39mm
Twist Rate	1:10 Twist
Gas Operating Block	Pistol-Length Gas System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device Component	Standard 5/8x24 Thread Pitch, A2 Birdcage Flash Hider with Crush Washer Pre-Installed
Handguard Rail	7 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Alignment, Modular M-LOK Attachment Points
Lower Receiver Parts Kit	Complete Mil-Spec Spring and Pin Kit, Polished Single-Stage Hammer and Trigger Assembly, Standard A2 Pistol Grip
Pistol Buffer Extension	Standard Blade, AR-15 Pistol Buffer Tube, Standard 3oz Carbine Buffer, and High-Tensile Buffer Spring
Manufacturing Origin	100% Assembled and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty

Why Buy This Product?

The PRO2A 7.5" 7.62x39 Pistol Length Melonite Upper Kit directly solves the performance and compatibility issues that historically plagued 7.62x39mm conversions on standard AR frames. Many home builders who piece together custom builds suffer from constant failure-to-fire errors because standard mil-spec firing pins lack the depth to detonate hard, deep-seated primers found in cheap steel-cased military surplus rounds. Pro2A Tactical systematically eliminates this headache by tailoring a master kit that ships with an enhanced firing pin and a pre-headspaced, specialized bolt carrier group natively balanced for this platform. This ensures reliable extraction and positive primer hits every time you pull the trigger.

Furthermore, sourcing individual parts across separate brands often introduces variations in tolerance that lead to short-cycling or feeding jams. By packaging the entire ecosystem together—including a finely tuned pistol-length gas network, an ultra-durable Melonite-treated barrel that stands up to corrosive ammunition, a full lower parts kit, and a matching buffer tube assembly—Pro2A Tactical guarantees immediate mechanical synergy out of the box. You get the devastating, barrier-blind kinetic energy of the 7.62x39mm cartridge out of an ultra-maneuverable 7.5-inch configuration without the high ammunition costs of specialized calibers. Backed by a lifetime factory warranty and built with strictly domestic components, this master conversion kit is a rock-solid, high-performance tactical asset.

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