PRO2A 16" 22LR 1/16 Rimfire Melonite M-LOK Upper Kit

PRO2A 16" 22LR 1/16 Rimfire Melonite M-LOK AR-15 Upper Kit

Product Description

Maximize your training efficiency, target precision, and cost-effective firearm manipulation on standard small-frame systems with a unified rimfire production suite. The PRO2A 16" 22LR Rimfire Upper Kit is a comprehensive rifle construction bundle meticulously engineered to consolidate your full-length rimfire assembly projects. Unlike standard centerfire setups running dirty adapter drops, this platform uses an exact-spec rimfire chamber and barrel grouping to secure superior projectile stabilization and clean cyclical routing. Built around a premium slick-side upper receiver, this system handles mass bulk ammunition options smoothly via a direct blowback bolt system. This builder bundle matches the fully assembled upper receiver with a heavy-duty dedicated steel .22 LR bolt group, standard charging handle, complete lower parts kit, and an adjustable carbine stock buffer assembly setup to simplify your next custom rimfire workbench build.

Key Features

Full-Length 16-Inch Velocity Profiles: Maximizes powder burn efficiency on premium and bulk rimfire cartridges, providing extended downrange trajectories and superior grouping parameters.
All-In-One Component Package: Simplifies procurement workflows by packing the dedicated rimfire bolt group, manual charging path, fire control group, and defensive stock furniture right into a singular product box.
Dedicated Rimfire Blowback Efficiency: Bypasses centerfire gas tubes and blocks entirely, using a reliable blowback bolt architecture that runs cooler and stays cleaner through heavy plinking sessions.
Resilient Free-Float M-LOK Architecture: Premium slim profile aluminum rail isolates the barrel from external handling pressure vectors, ensuring continuous point-of-impact accuracy.
Liquid Bath Nitride Hardening: The 4150 Chrome Moly Vanadium steel core features full interior and exterior QPQ Melonite coating to offer absolute weatherproofing and simple carbon cleanup.
100% Sourced & Assembled in the USA: Sourced and built to tight manufacturing metrics in Georgia, backed completely by premium custom-shop engineering quality parameters.

Technical Specifications

Upper Receiver	AR-15 Slick Side Mil-Spec Machined out of Billet Aluminum, Type III Hardcoat Anodized Black
Barrel Length & Profile	16-Inch Medium Profile
Caliber	.22 Long Rifle (Dedicated .22LR Chamber)
Twist Rate	1:16 Twist (Rimfire Standard Optimization)
Barrel Material & Treatment	4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Operating System	Direct Blowback (Gas Block and Tube Omitted for Rimfire Reliability)
Muzzle Thread & Device	1/2x28 Thread Pitch, A2 Flash Hider
Handguard Rail	15" Slim Free-Float M-LOK Handguard, Machined from 6061-T6 Aluminum with Top Picatinny Rail
Bolt Carrier Group & Handle	Dedicated .22 LR Direct Blowback Bolt Group Assembly, Heavy Duty Steel Structure. Standard Charging Handle
Lower Parts Kit	Complete AR-15 Lower Parts Kit (LPK) with Fire Control Group, Grip, and Milspec Trigger Setup
Stock Assembly	6-Position Adjustable Carbine M4 Stock with Buffer Tube, Buffer Spring, Castle Nut, and Receiver End Plate
Manufacturing Origin	100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty

Who Chooses This Upper Receiver?

Affordable High-Volume Marksmen

Shooters wanting to mirror their duty rifle mechanics choose this full 16-inch system to log endless positional target practice without straining centerfire supply budgets or altering barrel handling metrics.

Rimfire Precision Competitors

NRL22 or casual local precision rimfire challenge entrants select this optimized twist rate and long-sight-radius profile to capture tighter string consistencies across varying distances.

AR-15 Builders Demanding Complete Packages

Custom gunsmiths aiming to update a standard small-frame stripped lower into an innovative, highly functional training weapon select this package. It bundles all critical assembly steps together, providing proper component matching out of a single drop-in assembly array.

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