Pro2A Left Hand 20" 6mm ARC Rifle Length Melonite M-LOK AR-15 Upper Kit

PRO2A LEFT HAND 20" 6mm ARC 1/7.5 Rifle Length Melonite M-LOK AR-15 Upper Kit

Description

The Pro2A Tactical Left-Handed 20-inch 6mm ARC Complete Upper Kit includes everything required to convert a standard stripped lower receiver into a fully functional precision rifle system engineered specifically for southpaw shooters. Hand-assembled and quality checked in Georgia, this system pairs a velocity-maximizing 20-inch barrel and smooth-cycling rifle-length gas system with a dedicated left-hand ejection receiver. The package comes completely populated with a matching left-hand bolt carrier group, lower parts kit, and full stock assembly to completely isolate you from harsh port gases and flying brass.

Key Features

True Left-Handed Ergonomics: Features a dedicated left-side ejection architecture that protects southpaw operators from exhausting muzzle gases and spent casings.
All-In-One Conversion Package: Includes a fully assembled left-hand upper group, matching left-hand BCG, complete lower parts kit (LPK), fire control group, and a complete stock/buffer tube system.
Advanced 6mm ARC Engineering: Optimizes long-range ballistic potential from the standard AR-15 chassis, minimizing wind drift and offering exceptionally flat trajectory pathways.
Optimized Twist & Gas Curves: Features a quick 1/7.5 twist configuration to settle heavier match bullets downrange, stabilized by an extended rifle-length direct impingement gas setup.

Technical Specifications

Upper Receiver	Milspec Billet Aluminum M4 Flat Top Receiver, Left Hand Ejection, M4 Feed Ramps (Type III Hardcoat Anodized)
Barrel Length & Profile	20-Inch Medium Profile
Caliber	6mm ARC (Advanced Rifle Cartridge)
Twist Rate	1:7.5 Twist
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Corrosion-Resistant Melonite Finish
Gas System Length	Rifle Length Direct Impingement with 0.750 Low-Profile Gas Block
Bolt Carrier Group	Milspec Left hand M16 Full Auto Profile, 8620 Steel Carrier, 9310 Bolt, Nitride Treated, MPI Tested
Charging Handle	Standard Milspec Charging Handle
Handguard	15 Inch Free Float Slim Profile M-LOK Rail System with Integrated Top Picatinny Rail
Muzzle Thread & Device	5/8x24 Thread Pitch with Standard A2 Flash Hider
Lower Parts Kit	Complete AR-15 LPK with Pins, Springs, Detents, Grip, and Polished Mil-Spec Fire Control Group
Stock Assembly	Mil-Spec 6-Position Buffer Tube Assembly, Carbine Buffer, Spring, Castle Nut, Endplate, and Adjustable M4 Stock

Why Choose This Product?

Piecing together a high-performance, long-range rifle shouldn't result in left-handed shooters swallowing blowback gases or hunting down hard-to-find components. The Pro2A Left Hand 20" 6mm ARC Upper Kit resolves structural assembly issues entirely by supplying a factory-headspaced, hand-verified mechanical package right out of the box. Utilizing a deeply protected Melonite steel barrel and rugged forged aluminum elements, this comprehensive build package transitions standard AR lower frames into purpose-driven precision machines. It is the ultimate turnkey choice for southpaw long-range competitors and precision hunters demanding zero extraction compromises.