PRO2A Left Hand 18" 6.8 SPC II Melonite M-LOK AR-15 Upper Kit

PRO2A LEFT HAND 18" 6.8 SPC II 1/11 Mid Length Melonite M-LOK AR-15 Upper Kit

Product Description

Maximize your velocity scaling, terminal energy retention, and overall shooting comfort with the PRO2A LEFT HAND 18" 6.8 SPC II Mid Length Upper Kit. Explicitly engineered from the ground up to solve the persistent issues of right-hand ejection gas blowback and crossing casing fields for southpaw shooters, this specialized rifle kit features a dedicated left-ejecting configuration. Built around a premium forged 7075-T6 aluminum receiver block, this platform features an 18-inch 4150 CMV medium profile barrel. The 1:11 twist rate and Spec II chambering combine to safely handle standard factory hunting loads with minimized pressure margins, while a smooth direct impingement mid-length gas setup ensures a soft, uniform cycling stroke. Combined with an all-inclusive lower receiver build group and rifle stock assembly, this turnkey package simplifies your project, converting any standard stripped lower receiver into an elite left-handed medium-game hunting rifle.

Key Features

True Left-Hand Ejection Architecture: Dedicated mirrored port layout channels spent casings, visual debris, and harsh gas blowback cleanly out to the left side and completely away from a left-handed operator's face.
Optimized 18-Inch Muzzle Energies: Elongated barrel structure burns intermediate hunting powders completely, yielding a distinct velocity premium over shorter configurations to flatten downrange trajectories.
Proven SPEC II Performance Chambering: Configured natively to manage the higher pressures of modern 6.8mm hunting variants safely with predictable headspace metrics.
Resilient Free-Float M-LOK Architecture: Premium 15-inch slim profile aluminum rail isolates the barrel from external handling pressure vectors, ensuring continuous point-of-impact accuracy.
Turn-Key Rifle Build Setup: No piecemeal component tracking required; arrives complete with a full lower parts kit, mil-spec fire control group, and an adjustable rifle stock assembly to keep the system compliant.

Technical Specifications

Upper Receiver	Billet Aluminum, M4 Feed Ramps, (Dedicated Left-Hand Ejection Port Setup), Type III Hardcoat Anodized Black
Charging Handle	Standard Mil-Spec Charging Handle
Bolt Carrier Group	Milspec Left-Hand M16 Full Auto Profile, 6.8 SPC II Caliber, QPQ Nitride/Melonite Treated, MPI Tested, 8620 Carrier with 9310 Steel Bolt
Barrel Length & Profile	18-Inch Medium Profile
Caliber	6.8 SPC II (SPEC II Chamber)
Twist Rate	1:11 Twist Rate (Highly optimized for standard hunting loads and reduced internal friction parameters)
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	Standard A2 Flash Hider, 5/8-24 TPI
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?

Running intermediate rifle calibers out of right-handed setups frequently forces significant hot carbon debris back into a southpaw shooter's face, especially over extended string counts. Pro2A Tactical eliminates this hazard entirely. By matching true left-handed mechanical operations with an elongated 18-inch Spec II core and an all-inclusive rifle-length stock build bundle, this American-made kit yields custom tolerances and superior field consistency tailored entirely for left-handed requirements.