PRO2A LEFT HAND 18" 5.56 NATO 1/8 Mid Length Melonite M-LOK AR-15 Upper Kit

Product Description

The PRO2A Left Hand 18" 5.56 NATO Mid Length Melonite M-LOK AR-15 Upper Kit is an all-inclusive conversion package precision-engineered for left-handed shooters looking to build a highly precise, flat-shooting tactical or varmint rifle assembly. Featuring an 18-inch barrel profile for improved velocity signatures over shorter platforms, this complete completion kit solves all component matching guesswork by pairing a true left-ejecting forged receiver and specialized left-handed bolt carrier group with a full lower completion parts kit and stock assembly, transforming your standard stripped lower receiver into a highly ergonomic southpaw firearm.

Key Features

True Left-Hand Configuration: Mirrored left-side ejection port orientation safely redirects hot gas blowback and spent shell casings completely clear of a southpaw shooter's face and eyes.
Complete Build Integration: Bundles your high-accuracy 18-inch upper assembly with a dedicated left-handed BCG, standard charging handle, complete small lower parts, and an adjustable stock completion system.
Versatile 1/8 Twist Rate: Precision-grooved barrel infrastructure effectively stabilizes a very wide array of bullet grains, spanning from lightweight varmint rounds up to heavy match ammunition.
Smoother Mid-Length Gas Profile: Employs an optimized gas port distance to drop cyclic pressures and bolt slide speed, resulting in significantly smoothed out recoil metrics and lower internal wear.
Premium Melonite Structural Defense: Heavy-duty 4150 CMV steel barrel is liquid nitrided to secure exceptional corrosion protection, easier cleaning, and an extended throat longevity profile.

Technical Specifications

Upper Receiver	Billet Aluminum, M4 Feed Ramps (Dedicated Left-Hand Ejection Port Setup)
Charging Handle	Standard Mil-Spec Charging Handle
Bolt Carrier Group	Milspec Left-Hand M16 Full Auto Profile, QPQ Nitride/Melonite Treated, MPI Tested
Barrel Length & Profile	18-Inch Medium Profile
Caliber	5.56 NATO (Safely accepts .223 Remington)
Twist Rate	1:8 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	15-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle Device	A2 Flash Hider (1/2x28 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 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 18-inch left-handed build bundle provides a seamless pathway to maximum velocity and precision marksman utility without compromising on user ergonomics. By integrating a dedicated left-handed bolt carrier group with full lower receiver completion small parts and a stable recoil package, it completely cuts out the harsh unburned powder blowback and facial debris common when shooting standard right-handed uppers left-handed. Built for maximum downrange consistency and matched field longevity, it delivers home builders a streamlined, rugged solution optimized for continuous service operations.