PRO2A Left Hand 20" 22 ARC 1/7 Rifle Length Melonite M-LOK AR-15 Upper Kit | Pro2A Tactical

PRO2A LEFT HAND 20" 22 ARC 1/7 Rifle Length Melonite M-LOK AR-15 Upper Kit

Product Description

Unlock extreme high-velocity thresholds, ultra-flat trajectories, and match-grade precision out of a standard small-frame platform while maintaining absolute ergonomic safety. The PRO2A LEFT HAND 20" 22 ARC Rifle Length Melonite M-LOK Upper Kit provides an all-inclusive rifle completion package engineered explicitly to maximize the hyper-velocity attributes and high ballistic coefficients of Hornady's 22 Advanced Rifle Cartridge (ARC), tailored natively from the ground up for southpaw operators. Utilizing a mirrored left-ejecting receiver profile and a matching left-hand M16 bolt carrier group, this system completely removes cross-body brass throwing and facial carbon blowback. The premium 20-inch 4150 CMV barrel utilizes an aggressive 1:7 twist rate to provide immaculate rotational stabilization for long, heavy, low-drag 22-caliber projectiles. Operating on a tuned rifle-length gas system to ensure highly regulated gas pressures, optimal dwell times, and soft mechanical tracking, this turn-key platform arrives completely paired with a matching type 2 left-hand bolt carrier group, full lower parts conversion kit, and an adjustable stock assembly. Drop these components into your standard stripped lower receiver to finish an elite precision long-range southpaw tool.

Key Features

True Left-Hand Architecture: Dedicated mirrored left-ejection 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.
Elongated 20-Inch Ballistic Mastery: Maximizes complete powder burn efficiency for the 22 ARC cartridge, yielding an absolute velocity premium over shorter barrels to flatten far-reaching trajectories.
Aggressive 1:7 Fast Twist Performance: Engineered explicitly to flawlessly stabilize high-BC heavy match ammunition profiles under intense downrange crosswind conditions.
Regulated Rifle-Length Gas Cycling: Softens operating pressure curves and dampens bolt carrier impact speed, providing a linear recoil pulse and prolonging component life.
Turn-Key Rifle Build Setup: No piecemeal component tracking required; arrives complete with a complete left-hand upper assembly, type 2 left-hand bolt carrier group, full lower parts kit, fire control trigger group, and a standard adjustable rifle stock assembly.

Technical Specifications

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

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, 22 ARC / 6.5 Grendel Type 2 Face Configuration, QPQ Nitride/Melonite Treated, MPI Tested, 8620 Carrier with 9310 Steel Bolt
Barrel Length & Profile	20-Inch Medium Contour
Caliber	22 ARC (Advanced Rifle Cartridge)
Twist Rate	1:7 Twist (Highly optimized for Standard to heavy match and hunting projectiles)
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, 1/2x28 Thread Pitch, Bored for .224 Caliber

Why Choose This Product?

The 22 ARC turns the standard small-frame AR-15 platform into a legitimate 1,000-yard competitor, but running a high-pressure precision platform out of standard right-handed setups frequently forces unmanaged carbon gas and visual debris back across a left-handed operator's face over extended string counts. Pro2A Tactical remedies this directly by pairing a true mirrored left-ejection action with a premium, fully matched 20-inch Melonite core barrel, a high-pressure type 2 left-hand bolt carrier group, and an all-inclusive rifle-length stock bundle in one cohesive package. This premium, American-made assembly delivers elite mechanical consistency and safe-to-face precision tracking right out of the box.