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22 inch 6mm ARC Side Charging AR Upper | Left Hand | Pro2A Tactical

PRO2A LEFT HAND 20" 6mm ARC 1/7.5 Rifle Length NR Side Charging Melonite M-LOK AR-15 Upper

PRO2A LEFT HAND 16" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper

Rating:
98 % of 100
Special Price $669.99 $789.99

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.

MUZZLE DEVICEStandard A2 Flash Hider or Competition Muzzle Brake. Muzzle Brakes are for recoil reduction. The baffles and ports are milled larger to drive pressure up and to keep the muzzle down more effectively.

LEFT HAND 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
P2ALNR6ARCGAX12MID16-TK
PRO2A Left Hand 16" 6mm ARC Mid Length NR Side Charging Melonite Upper | Pro2A Tactical

PRO2A LEFT HAND 16" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper

Next-Gen 6mm Ballistics Engineered with Premium Southpaw Ergonomics

Experience the versatile downrange performance of Hornady's advanced 6mm ARC cartridge, optimized completely for southpaw marksmen. The PRO2A Left Hand 16" 6mm ARC Mid-Length Non-Reciprocating (NR) Side Charging Upper Assembly delivers clean, efficient control. By coupling a mirrored left-eject port layout with an intuitive left-side charging handle, this upper keeps hot brass and escaping blowback gases completely out of your peripheral line of sight. The non-reciprocating cocking handle stays fully stationary during cycling, ensuring it never strikes bulky target optics or gear. Built around a standard compliance-friendly 16-inch barrel and tuned with a smooth mid-length gas system, this premium upper drops natively onto any Mil-Spec AR-15 lower receiver to anchor a highly precise, soft-recoiling distance setup. Proudly 100% designed, machined, and hand-assembled in the USA.

Key Features

  • Mirrored Left-Hand Port & Side Charging Layout: Specifically designed to safely redirect spent casings and concentrated powder blowback out of the left side. The stationary side lever lets you charge the system easily from a prone or benched shooting position, maintaining constant weapon alignment and eliminating standard charging handle back-gas venting into your face.
  • Optimized 1:7.5 Fast Twist Rate: Crucial for the 6mm Advanced Rifle Cartridge, the tight 1:7.5 twist rate provides precision rotational stability to cleanly stabilize long, high-ballistic coefficient (BC) match projectiles, minimizing wind deflection over extreme distances.
  • 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 against high-velocity pressure spikes, aids thermal dissipation during long strings, and shuns harsh outdoor elements.
  • Balanced Mid-Length Gas Pulse: Tuned with a mid-length gas system to balance pressure metrics perfectly across the 16-inch barrel length, creating a remarkably soft recoil impulse, flat tracking, and minimized internal component stress.
  • 15-Inch Premium Free-Float Handguard: Formed from rugged 6061-T6 aluminum, the slim free-float M-LOK rail completely isolates barrel harmonics to preserve accuracy while providing massive layout space for tactical electronics, bipods, and a continuous top Picatinny structure.

Technical Specifications

Receiver Gibbz Arms G4 LEFT HANDED Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black
Barrel Material & Profile 16 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Profile Contour, Melonite Treated
Caliber 6mm ARC (Advanced Rifle Cartridge)
Twist Rate 1:7.5 Twist (Optimized for high-BC precision projectiles)
Gas Operating Block Mid-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device Config Standard 5/8-24 Thread Pitch, A2 Flash Hider with Crush Washer
Handguard 12" Slim Profile Free-Float M-LOK Rail, Machined from 6061-T6 Aluminum
Manufacturing Origin 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty

Who Chooses This Upper Receiver?

Southpaw Long-Range & PRS Competitors

Left-handed marksmen who want to match the low drop and high ballistic consistency of larger calibers while utilizing a lightweight, small-frame AR-15 platform rely on the 6mm ARC configuration for flat tournament strings.

Southpaw Open-Country & Predator Hunters

Coyote, varmint, and medium-game hunters operating across wide clearings choose this layout. The left-eject mechanism guarantees that quick follow-up shots can be executed cleanly without unburnt powder or spent brass crossing the shooter's visual line of sight.

Oversized, Thermal & Night Vision Users

Shooters running bulky thermal scopes, night-vision frames, or wide low-power variable optics (LPVOs) prefer side-charging setups. The left-side charging handle clears the wide undersides of scope mounts, protecting knuckles from scrape damage.

More Information
SKU P2ALNR6ARCGAX12MID16-TK
Barrel Length 16 inch
Rifle Caliber 6mm ARC
Manufacturer Pro2A Tactical
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