PRO2A 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper Kit

Product Overview

The PRO2A 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper Kit provides an all-inclusive, high-performance workspace solution tailored to harness the massive short-range kinetic energy of the straight-wall .350 Legend cartridge. Perfect for hunting regulations requiring straight-wall casings or close-quarters tactical builds, this master kit pairs a rigid, compact barrel configuration with highly reliable cycling components. Fully outfitted with a dedicated .350 Legend bolt carrier group, Mil-Spec charging handle, complete lower parts matrix, and a robust polymer blade system, this kit eliminates all component compatibility guesswork entirely.

Key Features

All-In-One Complete Kit Architecture: Seamlessly bundles all internal tracking mechanics, lower frame fire control components, and stabilizing furniture to complete your custom rifle project out of a single order.
Optimized Straight-Wall Hunting Balistics: The 10.5-inch barrel structure offers exceptional handling and agility while maintaining massive hard-hitting terminal energy at standard close-to-medium field distances.
Precision 1:16 Twist Stabilization: Explicitly engineered to properly stabilize standard 150gr to 180gr commercial hunting and defense projectiles for tight, reliable grouping patterns.
Liquid QPQ Melonite Preservation: Full-immersion liquid nitriding imbues the 4150 CMV barrel with severe-use surface hardness, mitigating intense throat erosion and resisting harsh outdoor weather environments.
Slim Profile Free-Float Handguard: Features an ultra-lean modular M-LOK rail system that aligns flush to the top receiver, giving you maximum flexibility for bipods, hunting lights, or tactical handstops.

Technical Specifications

Upper Receiver	Milspec 7075-T6 Forged Aluminum, Single Large Feed Ramp Profiled for Straight-Wall Cartridges, Forward Assist & Dust Cover, Type III Hardcoat Anodized Black
Charging Handle	Standard Mil-Spec Charging Handle
Bolt Carrier Group	Milspec Full-Auto Profile BCG, Nitride Treated, 8620 Steel Carrier, 9310 Steel Bolt, MPI Tested
Barrel Length & Profile	10.5-Inch Medium Profile
Caliber	350 Legend (Straight-Wall)
Twist Rate	1:16 Twist Rate (Optimized for maximum stabilization of commercial straight-wall ammunition weights)
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Melonite/QPQ Treatment
Gas System	Pistol Length Direct Impingement with Low-Profile Gas Block
Handguard	9-Inch Free Float Slim Profile M-LOK Rail System (Ensures clean accessory clearance)
Muzzle Device	Standard A2 Flash Hider (5/8x24 Thread Pitch)
Lower Parts Kit	Complete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Polished Mil-Spec Fire Control Group (Trigger & Hammer)
Blade Assembly	High Density Polymer Adjustable Blade, Pistol Buffer Tube (Receiver Extension), Carbine Recoil 3oz Buffer, and Spring

Why Choose This Product

Choosing this complete .350 Legend upper kit saves valuable development time by delivering factory-matched components optimized specifically for straight-wall shell dynamics. Modified feed pathways inside the forged receiver ensure reliable cycling and prevent nose-diving malfunctions typical of standard layouts when feeding non-bottlenecked casings. Completely assembled with premium treated components from the full-auto profile bolt carrier down to the polished fire control linkages, it delivers absolute mechanical reliability. Proudly manufactured in the USA from heavy-duty raw metals, this setup ensures an uncompromising tactical response straight out of the box.

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