PRO2A 16" 350 Legend Carbine Length Melonite M-LOK AR-15 Upper Kit

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

Product Overview

The PRO2A 16" 350 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper Kit provides the perfect all-in-one conversion package engineered to deliver exceptional medium-game hunting performance in straight-wall compliance states. Fully chambered in .350 Legend, this comprehensive master builder bundle contains every high-performance component required to transform a standard stripped lower receiver into a functional hunting asset. Built around a premium 16-inch Melonite-treated heavy profile barrel to balance maximum velocity with soft cycling, the optics-ready upper arrives completely assembled, headspaced, and timed on the manufacturing bench. This master package ships bundled with a caliber-matched M16 profile Nitride bolt carrier group, a full lower internal parts completion group, and a 6-position adjustable buttstock setup to finish your build right out of the box.

Key Features

All-In-One Complete Conversion Package: Streamlines your rifle project by completely grouping a pre-assembled upper receiver, pre-headspaced BCG, complete internal lower hardware parts kit, and an adjustable stock buffer tube configuration.
Big-Bore Profile Upper Receiver: Precision machined with an custom-enlarged ejection port layout designed explicitly to facilitate flawless, high-velocity extraction clearance for wide straight-walled .350 Legend brass casings.
Precision 1/16 Twist Optimization: Explicitly land-groove engineered to perfectly stabilize standard and heavy-weight .357-caliber sporting projectiles cleanly for flat trajectories and optimal energy transfer.
Reliable Carbine Gas Impingement: Standard low-profile 0.750" gas block and carbine length setup properly manage cyclic pressures for soft, reliable extraction and loading strings.
Inside-Out QPQ Melonite Shielding: Premium liquid salt-bath nitride surface treatment shields internal rifling paths against gas erosion while forming an impenetrable barrier against environmental moisture.
Slim Free-Float M-LOK Handguard: Isolates structural barrel harmonic variables to guarantee strict sub-MOA precision while extending a continuous top Picatinny rail axis and deep M-LOK modular mounting side walls.

Technical Specifications

Upper Receiver Assembly	Mil-Spec Forged 7075-T6 Aluminum, Enlarged M4 Feed Ramps, Type III Hardcoat Anodized Black Finish, Forward Assist & Dust Cover
Bolt Carrier Group (BCG)	Full M16 Profile, Heavy-Duty 9310 Steel Bolt, Caliber-Matched .350 Legend Bolt Face Assembly, Slick Black Nitride Treatment, MPI/HP Tested, Properly Staked Gas Key Layout
Charging Handle	Standard Mil-Spec Rear Charging Handle
Barrel Length & Contour	16 Inches; Medium Contour Profile
Barrel Material Composition	4150 Chrome Moly Vanadium (CMV) Structural Steel
Twist Rate	1:16 Twist (Optimized for straight-wall hunting bullet weights)
Barrel Coating Finish	QPQ Melonite / Premium Black Nitride Exterior and Interior Lining for Maximum Corrosive and Erosion Resistance
Gas Operating System	Carbine-Length Gas System with 0.750" Low Profile Gas Block, Stainless Steel Gas Tube Layout
Muzzle Thread & Device	5/8-24 TPI A2 Flash Hider, Enlarged to 35 Cal
Handguard Rails Profile	12 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Rail Alignment, Modular M-LOK Attachment Slots
Lower Receiver Parts Kit (LPK)	Complete Mil-Spec Component Springs and Pins Hardware, Single-Stage Fire Control Trigger Group Assembly (Trigger, Hammer, Disconnector), and Standard A2 Pistol Grip
Buttstock Assembly Setup	6-Position Adjustable M4 Buttstock, Mil-Spec Diameter Receiver Extension Tube, 3oz Carbine Buffer, and High-Tensile Recoil Buffer Spring Group
Manufacturing Origin & Quality	100% Proudly Assembled, Timed, and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty

Why Choose the PRO2A 16" 350 Legend Free-Float Rifle Kit?

Harnessing the flat trajectories and heavy punch of the .350 Legend cartridge inside a modern sporting rifle requires expert component pairing to prevent feeding jams or premature cycling wear. Standard rifle receivers cause catastrophic stovepipe malfunctions and failure-to-extract errors because narrow mil-spec ejection openings cannot clear wide straight-walled brass. Pro2A Tactical eliminates this engineering barrier directly on the manufacturing line—utilizing custom-expanded ejection channel tracks paired with a matching, pre-headspaced M16 profile 9310 steel bolt face to guarantee consistent extraction strings. By running a properly gas-tuned carbine system loop alongside a premium 16-inch Melonite heavy barrel, a complete internal lower components group, and a 6-position adjustable carbine buttstock, this master conversion package operates with superb structural harmony. Avoid part-by-part manufacturer mismatching and assemble your hard-hitting, duty-ready asset with absolute confidence right out of the box.

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