Pro2A 12.5" 5.56 NATO Mid Length Melonite M-LOK AR-15 Upper Kit

PRO2A 12.5" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper Kit

Description

The Pro2A Tactical 12.5-inch 5.56 NATO Complete Upper Kit contains all the necessary components to transform a standard stripped lower receiver into an advanced tactical rifle system. Proudly built and inspected in Georgia, this package utilizes a highly sought-after mid-length gas setup rarely found on barrels of this length. This configuration softens the cyclic pressure curve dramatically, reducing felt recoil and lowering internal part wear. Arriving complete with a populated upper group, matched bolt carrier group, full lower parts kit, and stock hardware, it completely eliminates compatibility guesswork out of the box.

Key Features

All-In-One Transformation Package: Bundles a fully populated 12.5" upper group, standard charging handle, matching nitride M16 BCG, complete lower parts kit (LPK), and a full blade assembly hardware package.
Soft-Shooting Mid-Length System: Rare mid-length gas design reduces gas port pressure spikes, minimizing felt recoil, slowing cyclic bolt carrier rates, and extending internal component life.
Balanced 12.5-Inch Profile: Yields significantly higher velocity thresholds and dwell time stabilization than ultra-short layouts, keeping performance flat out to extended medium ranges.
Premium Melonite Integrity: Treated inside and out with an ultra-hard Melonite finish, maximizing barrel bore life and defending against corrosive elements while offering effortless cleanings.

Technical Specifications

Upper Receiver	Milspec Forged 7075-T6 Aluminum M4 Flat Top Receiver, Forward Assist & Dust Cover, M4 Feed Ramps (Type III Hardcoat Anodized)
Barrel Length & Profile	12.5-Inch Medium Profile
Caliber	5.56 NATO (Safely processes both 5.56x45mm and .223 Remington)
Twist Rate	1:7 Twist
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Corrosion-Resistant Melonite Finish
Gas System Length	Mid Length Direct Impingement with 0.750 Low-Profile Gas Block
Handguard	12 Inch Free Float Slim Profile M-LOK Rail System with Integrated Top Picatinny Rail
Muzzle Thread & Device	1/2x28 TPI Standard A2 Flash Hider
Bolt Carrier Group & Handle	Full Auto M16 Profile, 9310 Bolt, 8620 Carrier, Nitride Treated, MPI Tested. Standard Charging Handle
Lower Parts Kit	Complete AR-15 LPK with Pins, Springs, Detents, Grip, and Polished Mil-Spec Fire Control Group
Stock Assembly	Pistol Buffer Tube Assembly, Carbine Buffer, Spring, Castle Nut, Endplate, and Adjustable High Density Polymer Blade

Why Choose This Product?

Stepping away from traditional over-gassed carbine setups on short barrels is crucial for structural cycling performance. The Pro2A 12.5" 5.56 NATO Upper Kit addresses this design vulnerability entirely by matching its factory-headspaced components to an extended mid-length direct impingement line, delivering an extraordinarily soft shooting impulse. By combining all build elements into a cohesive factory package, it erases configuration troubleshooting and third-party part variations. If you demand premium structural rigidity, maximized tactical maneuverability, and smooth operational consistency, this complete package is the ultimate drop-in transition solution.

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