PRO2A 18" 6.5 Grendel 1/8 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper Kit | Pro2A Tactical
PRO2A 18" 6.5 Grendel 1/8 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper Kit
Product Overview
The PRO2A 18" 6.5 Grendel 1/8 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper Kit provides an all-in-one rifle conversion package engineered to optimize mid-to-long-range ballistic dominance within a standard AR-15 chassis. Anchored by an 18-inch 4150 CMV barrel treated with an elite low-friction Melonite finish, this complete system unlocks the flat-shooting, high-energy potential of the 6.5 Grendel cartridge. Incorporating an premium Non-Reciprocating (NR) side-charging handle for rapid manual manipulation beneath large optics and bundled with a fully headspaced bolt carrier group and complete lower frame parts, this range-ready package drops seamlessly straight onto any mil-spec lower receiver framework.
Key Features
Non-Reciprocating Side Charging Billet Receiver: Manual side charging mechanism remains static during firing cycles, preventing structural interference with wide magnification target optics.
Heavy-Duty Melonite Barrel Defense: Liquid QPQ Nitride treatment maximizes land-and-groove core micro-hardness, defending against thermal throat erosion and environmental elements.
Precision 1/8 Button Rifling Twist: Specially optimized twist profile ensures uniform stabilization across the industry's most popular mid-to-heavy grain 6.5 Grendel projectiles.
Tuned Mid-Length Gas Configuration: Smoothly regulates internal pressures to extend bolt cycling extraction dwelling time, mitigating physical recoil climb and cyclic internal fatigue.
Complete Range-Ready Build Kit: Ships fully bundled with a tailored side-charging Bolt Carrier Group (BCG), slim free-float M-LOK rail system, full lower components tree, and stock assembly.
Technical Specifications
Caliber / Chamber:
6.5 Grendel (Type II)
Barrel Length:
18 Inches
Barrel Material:
4150 Chrome Moly Vanadium Steel
Twist Rate:
1:8 Right-Hand Twist
Barrel Coating Finish:
QPQ Melonite / Black Nitride Finish
Gas System Length:
Mid-Length System with 0.750" Low Profile Gas Block
Receiver Configuration:
Gibbz Arms G4 Billet Aluminum Non-Reciprocating Side Charging Upper Architecture, Gen 2 Handle (Type III Hardcoat Anodized)
Bolt Carrier Group (BCG):
Premium M16 Profile BCG with 6.5 Grendel Type II Bolt Face, Nitride Finish, MPI Tested
Muzzle Threads & Device:
5/8x24 TPI; Premium A2 Flash Hider
Handguard Interface:
15 inch Free-Float Ergonomic Slim M-LOK Rail System with Continuous Top Picatinny Rail Layout
Lower Parts Kit (LPK):
Complete Mil-Spec Lower Parts Kit including crisp Single-Stage Fire Control Group (Trigger, Hammer, Springs), A2 Pistol Grip, and full pins/detent arrays
Stock Assembly:
6-Position Adjustable M4 Stock complete with Mil-Spec Buffer Tube, Carbine Recoil Buffer, Spring, Castle Nut, and End Plate
Manufacturing Origin:
100% Made in the USA
Why Choose This Product?
This premium 18-inch 6.5 Grendel conversion package gives marksmen the ultimate direct-to-consumer blend of heavy intermediate power, smooth long-distance extraction, and pristine shooting ergonomics. By engineering an advanced left-side non-reciprocating cocking setup in place of standard rear military charging latches, weapon manipulation remains effortless and perfectly accessible underneath long-range varmint or hunting scopes. Completely fine-tuned on a mid-length gas length and shipped complete with a precisely headspaced Type II bolt group and full assembly hardware, this comprehensive bundle provides sub-MOA long-range accuracy and flawless downrange terminal energy inside a lightweight, highly adaptive platform.
