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16 inch 300 BLK NR Side Charging Upper

PRO2A 16" 300 Blackout 1/7 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper

12.5 inch AR-15 6.5 Grendel Carbine Length M-LOK Melonite Upper with Can

PRO2A 12.5" 6.5 Grendel 1/8 Carbine Length Melonite M-LOK AR-15 Upper with Flash Can

PRO2A 12.5" 6.5 Grendel 1/8 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can

Rating:
90 % of 100
Special Price $679.99 $809.99

OPTION DETAILS

GAS BLOCK: Standard or Adjustable. Adjustable is a great option if you are using a suppressor or just want to fine tune your system.

Bolt Carrier Group: BCG is Optional. Select Nitride if you need a BCG to complete Upper . All our BCGs are M16 Profile, Properly Staked Gas Key, MP Tested, 8620 Carrier, 9310 Bolt. Nitride is a surface hardening process that creates a tough and slick surface. 

Availability:
In stock
SKU
P2ANR65GAX15CAR125CAN-TK
PRO2A 12.5" 6.5 Grendel Carbine Length NR Side Charging Upper with Flash Can | Pro2A Tactical

PRO2A 12.5" 6.5 Grendel Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can

Mid-Range Ballistic Power in a Compact, Ergonomic Footprint

Maximize the performance of the inherently accurate 6.5 Grendel cartridge in a tight, fast-handling profile. The PRO2A 12.5" 6.5 Grendel Carbine Length Non-Reciprocating (NR) Side Charging Upper Assembly with Flash Can upgrades standard frame ergonomics by swapping out the rear dual-pull tab for a left-side charging handle. The handle stays fully stationary during live fire, eliminating moving external parts near your optics. Pre-equipped with a slimline tactical flash can, it forces intense muzzle concussion and noise straight forward downrange away from the operator. Built around a 12.5-inch 4150 CMV barrel tuned with a carbine-length gas path for smooth operation, this premium upper drops natively onto any standard Mil-Spec lower receiver. Proudly 100% designed, machined, and precision-assembled in the USA.

Key Features

  • Stationary Side-Charging Interface: The premium non-reciprocating left-side manual handle operates completely independently from the bolt carrier cycle. This allows for fluid charging from a prone or benched position and seals off the rear opening to block high-pressure backpressure gases from venting into your face.
  • Integrated Slimline Flash Can: Pre-installed on the muzzle to manage the sharp acoustic blast typical of short-barrel configurations. It acts as a linear director, projecting noise, concussive pressure, and flash straight toward the target to maximize shooting lane comfort.
  • Optimized 1:8 Twist Rifling: Specifically button-rifled with a versatile 1:8 twist profile to maximize rotation on common 6.5mm match and hunting projectiles (120gr - 123gr), ensuring consistent medium-range stabilization.
  • Melonite/Nitride Barrel Protection: The heavy-duty 4150 CMV steel barrel is fully Nitride/Melonite treated inside and out. This premium chemical hardening vastly extends barrel life, aids in uniform thermal dissipation, and counters harsh weather corrosion.
  • Slim Profile Free-Float M-LOK Rail: Built from durable 6061-T6 aluminum, the free-float handguard completely isolates barrel vibrations to preserve uniform mechanical accuracy while offering extensive M-LOK attachment slots and a continuous top Picatinny rail.

Technical Specifications

Upper Receiver Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black
Barrel Length & Steel 12.5 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel
Caliber 6.5 Grendel Type II (.136" Bolt Face Depth)
Twist Rate 1:8 Twist
Gas Operating Block Carbine-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device Standard 6.5 Grendel Thread Pitch (5/8-24 Threads), Pre-Installed Slimline Linear Flash Can
Handguard 15 Inch Slim Profile Free-Float M-LOK Handguard, Extended Profile Partially Tucking the Muzzle Device, Machined from 6061-T6 Aluminum
Manufacturing Origin 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty

Who Chooses This Upper Receiver?

Thick Brush & Whitetail Tree Stand Hunters

Hunters navigating thick timber or cramped blinds choose this 12.5-inch setup. It balances an ultra-compact footprint for easy swinging with the heavy downrange impact of the 6.5 Grendel cartridge, outperforming standard sub-calibers on medium-sized game.

Oversized Optics & Thermal Night Hunters

Predator and hog hunters running bulky low-power variable optics (LPVOs) or wide thermal sights prefer side-charging platforms. The left-mounted handle leaves massive clearance space below the scope base, preventing scraped knuckles against large mounts.

Compact Precision Pistol Builders

Enthusiasts wanting to push an inherently accurate long-range cartridge within a highly compact, mobile layout choose this upper. The configuration provides a rigid, soft-shooting platform that is easy to manage on standard pistol or SBR lower builds.

More Information
SKU P2ANR65GAX15CAR125CAN-TK
Barrel Length 12.5 inch
Rifle Caliber 6.5 Grendel
Manufacturer Pro2A Tactical
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