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13.7 inch 5.56 NATO Left Hand Side Charging Upper Kit

PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper Kit

13.7 inch 5.56 NATO Left Hand Upper Kit | Pro2A Tactical

PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper Kit

PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit

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Special Price $849.99 $1,119.99
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SKU
P2ALNR556GFS15MID137CAN-BA-KIT
PRO2A Left Hand 13.7" 5.56 NATO NR Side Charging Upper Kit with Flash Can

PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit

Product Overview

The PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit represents an elite, all-in-one assembly package for southpaw marksmen seeking premium intermediate ballistics with optimized muzzle control. This comprehensive performance build kit pairs a mirror-image left ejection configuration with a fluid, Non-Reciprocating (NR) side charging receiver system. To effectively manage the intense blast footprint and side-concussion common to short-barreled tactical setups, the upper comes equipped with an integrated linear Flash Can muzzle device tucked cleanly beneath the rail. Delivering everything needed to fully complete your stripped lower assembly, this kit arrives complete with a specialized true left-handed Bolt Carrier Group (BCG), a full Mil-Spec lower parts kit, and an adjustable pistol stabilizing blade setup.

Key Features

  • True Left-Hand Architecture & BCG: Mirrored left-ejecting upper paired with a matched left-handed bolt carrier group safely routes blinding carbon blowback, hot unburnt powder, and spent casings entirely away from left-dominant eyes.
  • Non-Reciprocating Side Charging: Fluid manual control handle remains completely stationary while the action cycles, giving you absolute structural clearance for optics without moving parts near your support hand.
  • Linear Flash Can Muzzle Device: Channels aggressive muzzle blast by forcing high-pressure sound energy, thermal expansion, and concussive shock waves directly downrange and away from the operator.
  • Complete Build Components Package: Takes the technical configuration guesswork out of assembly by grouping a premium mil-spec lower parts kit, left-hand side-charging BCG, and a stabilizing pistol blade system under a single part number.
  • The 13.7-Inch Ballistic Sweet Spot: Drastically slashes overall length over traditional rifles to maximize handling agility, while preserving outstanding 5.56 NATO muzzle velocity and flat downrange trajectories.
  • Smooth Mid-Length Gas System: Balanced gas ports paired with a low-profile gas block extend dwell time to smooth out component cycling, reduce mechanical wear, and soften the felt recoil impulse.

Technical Specifications

Receiver Orientation: True Left-Handed / Left-Side Ejection Geometry
Charging Handle Layout: Non-Reciprocating (NR) Left-Side Charging System
Bolt Carrier Group (BCG): Premium True Left-Handed BCG, M16 Profile, Nitride/Melonite Finished, Caliber-Matched Bolt Face
Lower Parts Kit (LPK): Complete AR-15 Mil-Spec Lower Parts Kit (Includes Trigger, Hammer, Disconnector, Pins, Detents, Springs, and Pistol Grip)
Stabilizing Assembly: Pistol Stabilizing Blade Assembly complete with Pistol Buffer Tube, Recoil Spring, and Buffer
Muzzle Device: 1/2-28 TPI Slimline Linear Flash Can (Blast Forwarder Device) Tucked Under Handguard
Caliber / Chamber: 5.56 NATO (Fully Compatible with .223 Remington)
Barrel Length & Contour: 13.7 Inches Medium Profile
Barrel Material: 4150 Chrome Moly Vanadium Steel
Twist Rate: 1:7 Twist
Barrel Finish: QPQ Melonite / Black Nitride Corrosion-Resistant Exterior and Interior Lining
Gas System Length: Tuned Mid-Length Gas System with 0.750" Low Profile Gas Block Set
Upper Receiver Type: Gibbz Arms G4 Left Hand Billet Aluminum Receiver Architecture (Type III Hardcoat Anodized)
Handguard Profile: 15 Inch Slim Free-Float Modular M-LOK Rail Layout with Continuous Top Picatinny Rail System
Manufacturing Origin: 100% Proudly Made in the USA

Why Choose This Product?

True Southpaw Safety from Exhaust GasesStandard right-handed short-barreled rifles force left-handed operators to shoot straight through a concentrated cloud of unburnt powder, toxic gas, and hot flying brass. This custom mirrored left-ejection receiver routes all abrasive debris completely to the left, protecting your lungs and keeping your line of sight flawless.

Lock Into Your Optic with Non-Reciprocating ControlTraditional rear charging handles require you to break your cheek weld, collapse your shooting stance, and drag a handle right beneath your optical plane to cycle the weapon. The non-reciprocating side-charging handle moves manual manipulation to a fluid side lever that stays completely stationary while firing. You get clean clearance for premium tactical optics and the ability to clear a malfunction without moving parts near your support hand.

Ultimate Blast and Concussion ControlFiring high-velocity 5.56 NATO rounds out of shorter barrels creates an aggressive, high-pressure concussive footprint that is punishing at indoor ranges or inside tight defensive blinds. The integrated linear Flash Can catches that raw structural blast and channels the sound pressure, thermal expansion, and flash signature directly downrange away from your face and ears.

The 13.7" Intermediate Ballistic Sweet SpotWhile ultra-short barrels severely limit the velocity, effective range, and fragmentation capability of the 5.56 NATO cartridge, a 13.7-inch intermediate barrel preserves excellent terminal velocity and flatter trajectories. Paired with a fast 1/7 twist rate and premium Salt Bath Melonite case hardening, it properly stabilizes heavier tactical projectiles (62gr to 77gr) while maintaining peak agility in tight spaces.

More Information
SKU P2ALNR556GFS15MID137CAN-BA-KIT
Barrel Length 13.7 inch
Rifle Caliber 5.56 NATO
Manufacturer Pro2A Tactical
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