PRO2A 14.5" 5.56 NATO Mid Melonite M-LOK AR-15 Upper Kit - Pinned & Welded

PRO2A 14.5" 5.56 NATO 1/7 Mid Melonite M-LOK AR-15 Upper Kit - Pinned & Welded

Product Description

The PRO2A 14.5" 5.56 NATO Mid Melonite M-LOK Upper Kit - Pinned & Welded delivers a comprehensive, all-in-one rifle construction package engineered for builders wanting maximum maneuverability without dealing with NFA short-barreled rifle registration. This premium completion kit features an extended muzzle device that is professionally pinned and welded to permanently bring the overall barrel length past the standard legal 16-inch civilian threshold. Complete with a soft-cycling mid-length upper system, a full nitrided bolt carrier group, standard charging handle, a comprehensive lower parts kit, and a matching stock assembly, it supplies everything required to streamline your stripped lower into a field-ready carbine.

Key Features

Non-NFA Legal Compliance: An extended muzzle device is permanently attached using a seamless pin-and-weld process, ensuring a handy short-carbine stance while cleanly meeting full legal length requirements.
Complete Build Integration: Bundles your high-accuracy upper assembly, full nitrided BCG, standard charging handle, small lower receiver completion components, and an adjustable stock system into a singular package.
Smoother Mid-Length Gas Profile: Employs an optimal gas-port distance to naturally lower slide velocities and system pressure spikes, minimizing component wear and smoothing out overall rifle recoil patterns.
Premium Melonite Structural Defense: Heavy-duty 4150 CMV steel is thoroughly liquid nitrided to secure supreme environmental corrosion resistance and a longer bore throat life.

Technical Specifications

Upper Receiver	Milspec 7075-T6 Forged Aluminum, M4 Feed Ramps, Forward Assist & Dust Cover, Anodized Black
Charging System	Standard Mil-Spec Charging Handle
Bolt Carrier Group	Milspec Full-Auto Profile, Nitride Treated, 9310 Bolt, 8620 Carrier, MPI Tested
Barrel Length	14.5-Inch Barrel (Permanently achieves 16-Inch Overall Length via Pinned & Welded muzzle extension)
Caliber	5.56 NATO (Safely accepts .223 Remington)
Twist Rate	1:7 Twist Rate
Barrel Material	4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas System	Mid Length Direct Impingement with Low-Profile Gas Block
Handguard	12-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle Device	Extended A2 Flash Hider (Permanently Pinned and Welded / 1/2x28 Thread Base)
Lower Parts Kit	Complete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Mil-Spec Fire Control Group (Trigger & Hammer Assembly)
Stock Assembly	M4 Carbine Adjustable Buttstock, 6-Position Mil-Spec Buffer Tube (Receiver Extension), Carbine Recoil Buffer, and Spring

Why Choose This Product?

This premium 14.5-inch pinned and welded complete kit bridges the structural gap between tight, compact close-quarters handling and zero-compromise legal compliance. By utilizing an optimal mid-length gas system configuration, it eliminates the harsh over-gassed cycling common to traditional carbine-length builds. Shipped completely with a heavy-duty nitrided full-auto bolt carrier group, full lower parts completion set, and adjustable stock system components, it equips home builders with an exceptionally rugged, non-NFA restricted rifle system built to perform reliably over continuous hard field deployment.

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