PRO2A LEFT HAND 12.5" 6.5 Grendel 1/8 Carbine Length Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A LEFT HAND 12.5" 6.5 Grendel 1/8 Carbine Length Melonite M-LOK AR-15 Upper is engineered specifically for southpaw shooters demanding flat-shooting, medium-to-long-range ballistic capability from a highly compact, maneuverable build. Chambered in the inherently accurate 6.5 Grendel cartridge, this complete upper receiver assembly utilizes a mirrored left-ejection design. By throwing hot spent brass and expanding gases completely away from your sightlines, it provides a distraction-free shooting experience. The 12.5-inch barrel configuration yields the optimal balance between high velocity retention and quick maneuvering across tight brush or vehicular configurations.

Key Features

True Left-Hand Geometry: Built with a dedicated left-ejecting upper receiver and a matched left-handed bolt carrier group to eliminate right-side exhaust and brass path distraction for southpaw shooters.
Maneuverable 12.5-Inch Profile: Slashes overall firearm length compared to traditional rifles, maximizing handling speed while preserving excellent 6.5 Grendel trajectory properties.
Precision 1/8 Twist Rate: Optimized explicitly to stabilize a versatile selection of heavy and match-grade 6.5 Grendel projectiles for repeatable downrange groupings.
QPQ Melonite Surface Hardening: Premium Salt Bath Nitride finish shields internal rifling and external steel surfaces against corrosive moisture, surface scoring, and high thermal transfer.
Tuned Carbine Gas Calibration: Paired with a low-profile gas block to guarantee positive extraction, reliable dwell time, and smooth cycling mechanics.

Technical Specifications

Receiver Orientation:	True Left-Handed / Left Ejection Port
Caliber / Chamber:	6.5 Grendel (Type II)
Barrel Length & Contour:	12.5 Inches Medium Profile
Barrel Material:	4150 Chrome Moly Vanadium Steel - Made for us by Tactical Kinetics
Twist Rate:	1:8 Twist Ratio
Barrel Coating Finish:	QPQ Melonite / Black Nitride Finish
Gas System Length:	Carbine-Length Gas System with 0.750" Low Profile Gas Block
Muzzle Device:	5/8x24 TPI A2 Flash Hider
Upper Receiver Type:	Left-Hand Specific Billet Aluminum (Mil-Spec Type III Hardcoat Anodized)
Handguard Integration:	10 Inch Slim Profile Free-Float Modular M-LOK Rail System with Continuous Top Picatinny Rail
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

The 6.5 Grendel cartridge brings bolt-action accuracy and incredible downrange energy to the AR-15 platform. However, traditional right-handed configurations force left-handed shooters to deal with carbon blowback and flying hot brass right in front of their faces. The PRO2A Left Hand 12.5" Upper eliminates this issue entirely with a purpose-built southpaw geometry that keeps your vision perfectly clear. Blending premium US-made 4150 steel construction, a highly durable Melonite barrel lining, and a softer-cycling carbine gas system, this upper assembly gives you standard-length long-range efficiency in a compact, fast-handling package ready for the field.