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7.5 inch LEFT HANDED AR-15 350 Legend Pistol Length M-LOK Nitride Upper w/Can

PRO2A LEFT HAND 7.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can

10.5 inch LEFT HANDED AR-15 350 Legend M-LOK Nitride Upper w/Can

PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can

PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper

Rating:
100 % of 100
Special Price $299.99 $499.99

OPTION DETAILS

HANDGUARD: Want to tuck your suppressor inside the rail? Now you can with the Aero Precision Enhanced Gen 2 M-LOK Handguards. Choose from the available lengths in the options menu. Check and verify the dimensions of your suppressor and the handguard. Available in Black only. 

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/CH 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. Standard Charging Handle Included if BCG Option is selected. 

Availability:
In stock
SKU
P2AL350AX9PIS105-HT
PRO2A Left Hand 10.5" 350 Legend Pistol Length Melonite M-LOK Upper | Pro2A Tactical

PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper

Maneuverable Straight-Wall Hunting Power Explicitly Built for Southpaw Marksmen

Conquer modern hunting mandates and dense timber navigation without typical right-hand frame compromises. The PRO2A Left Hand 10.5" 350 Legend Pistol Length Upper Receiver Assembly is engineered from the ground up for southpaw shooters utilizing the highly efficient, straight-walled .350 Legend cartridge. Featuring a fully mirrored port layout, this upper safely isolates heavy gas blowback and expanding combustion debris out the left side—completely clearing a left-handed shooter's face and line of sight. Its compact 10.5-inch barrel setup yields an exceptionally fast-handling profile that drops natively onto any Mil-Spec lower receiver configured as a legal pistol or registered SBR. Proudly 100% designed, machined, and hand-assembled in the USA.

Key Features

  • True Left-Hand Architecture: Features a fully mirrored port configuration that ejects spent casing brass cleanly out of the left side of the upper, redirecting heavy straight-wall gas blowback away from left-handed shooters' eyes and faces.
  • Optimized 1:16 Twist Rate: The 1:16 right-hand button-rifled twist pattern is mathematically tailored for standard .357-diameter hunting bullets, flawlessly stabilizing common 150-grain, 170-grain, and heavy 180-grain straight-wall hunting ammunition classes.
  • Melonite/Nitride Barrel Protection: The heavy-duty 4150 CMV steel barrel is fully treated with a premium Melonite finish inside and out. This high-grade hardening process vastly extends barrel life, aids in uniform thermal dissipation, and handles corrosive outdoor elements beautifully.
  • Pistol-Length Gas Tuning: Specifically configured with a low-profile steel gas block and pistol gas tube to capitalize on the unique pressure metrics of the 350 Legend cartridge, ensuring flawless cyclic reliability out of short-barrel lengths.
  • Free-Float Modular M-LOK Handguard: Machined from rigid 6061-T6 aluminum, the slim free-float rail isolates barrel vibrations to preserve uniform mechanical accuracy while offering expansive real estate for tactical electronics, grips, and an uninterrupted top Picatinny configuration.

Technical Specifications

Receiver Dedicated Left Hand (Left Eject), Billet Aluminum, Single Large Feed Ramp, Type III Hardcoat Anodized Black
Barrel Length & Steel 10.5 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel, Melonite Treated
Caliber 350 Legend (Approved straight-walled hunting cartridge configuration)
Twist Rate 1:16 Twist
Gas Operating Block Pistol-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device 350L Thread Pitch (5/8-24 Threads), A2 Birdcage Flash Hider with Crush Washer
Handguard 9" 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 Straight-Wall Whitetail Hunters

Sportsmen operating in restricted straight-wall states (such as Ohio, Michigan, Iowa, and Indiana) choose this configuration to build a lightweight, legal left-handed AR hunting pistol that keeps flying brass out of their face during critical follow-up tracking shots.

Thick Brush & Blind Woods Navigators

Hunters who spend their time in dense timber or cramped tree stands value the ultra-short 10.5-inch overall footprint. It eliminates snag hazards and allows for effortless target swinging inside tight physical blinds while retaining lethal medium-range energy drops.

Low-Recoil Big Bore Enthusiasts

Enthusiasts wanting a hard-hitting projectile without excessive cyclic kick choose the 350 Legend. The combination of its straight-walled design and soft pistol-length gas system delivers low felt recoil, perfect for younger hunters or high-volume practice sessions.

More Information
SKU P2AL350AX9PIS105-HT
Barrel Length 10.5 inch
Rifle Caliber 350 Legend
Manufacturer Pro2A Tactical
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