Pro2A Tactical 16" 6.5 Grendel Mid Length Melonite M-LOK AR-15 Upper

Transform your standard AR-15 into a long-range hunting and precision powerhouse with the Pro2A Tactical 16" 6.5 Grendel Mid Length Melonite M-LOK Upper. Engineered to maximize the unique ballistic advantages of the 6.5 Grendel cartridge, this complete upper receiver features a heavy-duty 16-inch Melonite barrel with a versatile 1:8 twist rate. Utilizing a finely tuned mid-length gas system to deliver incredibly smooth cycling and lower felt recoil, this upper comes paired with a rigid, free-float M-LOK handguard that completely isolates the barrel. It is the ultimate plug-and-play solution for medium-game hunting, target shooting, and long-range accuracy setups without NFA restrictions.

Key Features & Technical Specifications

• Caliber: 6.5 Grendel (Type II Chamber specification)
• Barrel Length: 16 Inches 
• Gas System: Mid-Length (Tuned for smooth cycling, lower port pressures, and extended component life)
• Barrel Twist Rate: 1:8 Twist (Optimized to accurately stabilize popular 6.5mm projectiles ranging from 90gr to 123gr+)
• Barrel Finish: 4150 Chrome moly vanadium with Premium Melonite liquid nitriding for exceptional bore longevity, friction reduction, and superior weather defense
• Handguard: 12 inch Lightweight, Free-Float M-LOK rail system with a continuous top Picatinny rail for rock-solid optics placement
• Muzzle Thread: 5/8x24 TPI A2 Flash Hider
• Receiver Material: Hard coat anodized black Mil-Spec forged 7075-T6 aluminum upper receiver with M4 feed ramps, forward assist and ejection port cover
• Platform Compatibility: Seamlessly mounts onto any standard mil-spec AR-15 lower receiver

Why Choose the Pro2A Tactical 16" 6.5 Grendel Upper?

Big-Bore Ballistics on a Standard AR-15 Platform

The 6.5 Grendel cartridge was explicitly designed to extend the effective range and terminal performance of the traditional AR-15 rifle. A 16-inch barrel length squeezes impressive muzzle velocity out of the round, giving you an ethical medium-game hunting platform for deer and hogs. It retains energy exceptionally well downrange, rivaling larger cartridges while fitting cleanly inside standard dimensions.

Mid-Length Gas System for Soft, Flat Shooting

Managing dwell time is crucial for extraction reliability. By opting for a mid-length gas system on this 16" upper, the mechanical cycling curve is softened compared to aggressive carbine systems. This delays bolt unlock, reduces gas blowback, tames the punch of the Grendel round into a smooth linear push, and helps you keep your crosshairs locked on target for immediate follow-up tracking.

Melonite Advanced Bore Armor

Built to withstand extreme elements, our Melonite-finished barrel utilizes an advanced QPQ liquid nitriding surface treatment. This process hardens the metal on a molecular level inside the bore, chamber, and exterior profile. The result is maximum wear resistance against high-velocity strings of fire and superior rust protection without sacrificing match-grade accuracy.

Rigid, Free-Float M-LOK Customization

Protect your downrange zero from external resting force. The sleek, free-floating M-LOK handguard securely locks to the barrel nut, keeping your bipod pressure or barricade rests from warping natural barrel harmonics. Outfitted with precision M-LOK cutouts at the 3, 6, and 9 o'clock positions, mounting tactical accessories is entirely clean and modular.

Lifetime Warranty and Support:

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