PRO2A Left Hand 20" 6.8 SPC II Melonite M-LOK AR-15 Upper Kit

PRO2A LEFT HAND 20" 6.8 SPC II 1/11 Rifle Length Melonite M-LOK AR-15 Upper Kit

Product Description

Squeeze the absolute maximum velocity, range, and flat-shooting precision out of your medium-game platform with the PRO2A LEFT HAND 20" 6.8 SPC II Upper Kit. Built from the ground up to accommodate left-handed operators, this full-length rifle configuration completely routes hot gas blast and flying brass down the left side, keeping your line of sight perfectly clear. The 20-inch medium profile barrel optimizes the intermediate ballistics of the 6.8 SPC II round, while a true rifle-length direct impingement gas system yields an incredibly soft, smooth recoil stroke. Shipping with an all-inclusive lower parts kit and a matching adjustable stock system, this comprehensive build package transforms your stripped lower receiver into a premier southpaw hunting rifle.

Key Features

Full-Length 20-Inch Ballistics: Extracts highest muzzle velocities and maximum kinetic energy from the 6.8 SPC II round for flat downrange accuracy.
True Left-Hand Architecture: Mirrored port setup prevents standard right-side gas blowback and crossing casings from affecting left-handed shooters.
Ultra-Smooth Rifle Gas System: Elongated gas transit drops dwell times and cyclic port pressures, generating a soft, highly controllable shooting experience.
Premium QPQ Melonite Finish: Liquid nitride hardened 4150 Chrome Moly Vanadium barrel ensures severe weatherproofing and long-lasting accurate performance.
Complete Lower Build Package: No piecemeal tracking required—arrives with a complete mil-spec lower parts group and matching structural stock setup.

Technical Specifications

Upper Receiver	Billet Aluminum, Single Large Feed Ramp, (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	20-Inch Medium Profile
Caliber	6.8 SPC II (SPEC II Chamber)
Twist Rate	1:11 Twist Rate (Optimized for standard hunting loads and reduced pressure margins)
Barrel Material	4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas System	Rifle 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?

The 20-inch 6.8 SPC II setup is highly favored by hunters tracking game at extended distances, offering a noticeable velocity premium over standard 16-inch configurations. By pairing an all-inclusive rifle-length stock bundle with a dedicated left-handed receiver configuration, Pro2A Tactical removes the guesswork, providing a premium, non-NFA custom setup optimized entirely for left-handed requirements.