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The PRO2A LEFT HAND 13.7" 5.56 NATO Mid Length Non-Reciprocating Side Charging Melonite M-LOK Upper Kit with Pinned & Welded Muzzle Device offers a comprehensive, premium construction bundle engineered explicitly for southpaw shooters who demand premium modern weapon logistics. Chambered in reliable 5.56 NATO, this all-in-one rifle assembly package mirrors standard setups to keep gas and burning debris completely out of a left-handed shooter's line of sight, while replacing traditional rear charging handle configurations with a highly efficient Non-Reciprocating (NR) Side Charging System. This kit includes a left-hand eject side-charging billet upper receiver paired with a matching left-handed side-charge bolt carrier group, a complete lower parts kit, and an adjustable carbine stock buffer assembly. Featuring a permanently pinned and welded slimline flash can to securely meet federal compliance lengths without complex regulatory paperwork, it brings specialized tactical ergonomics right out of the box.
| Upper Receiver | Gibbz Arms G4 Billet Aluminum Non-Reciprocating Side Charging Upper Receiver, Left Hand Ejection, M4 Feed Ramps, Anodized Black Finish |
|---|---|
| Charging System | Right-Side Non-Reciprocating Charging System (Static Handle Design) for Left-Eject Configuration |
| Barrel Length & Profile | 13.7-Inch Barrel (Permanently achieves 16-Inch Overall Length via Pinned & Welded muzzle device) |
| Caliber | 5.56 NATO (Safely accepts .223 Remington) |
| Twist Rate | 1:7 Twist |
| Barrel Material & Treatment | 4150 Chrome Moly Vanadium Steel, Premium Corrosion-Resistant QPQ Melonite Nitride Finish |
| Gas Operating Block | Mid Length Direct Impingement, Low-Profile Steel Gas Block, Stainless Steel Gas Tube |
| Muzzle Thread & Device | 1/2-28 "Pro2A Flash Guardian" 3 Prong Flash Hider (Permanently Pinned and Welded) |
| Handguard Rail | 12-Inch Extended Free Float Slim Profile M-LOK Handguard Rail System (Recesses muzzle device cleanly) |
| Bolt Carrier Group | Left Hand Full Auto M16 Profile, Heavy Duty Bolt Carrier Group, Nitride Treated, Properly Staked Gas Key |
| Lower Parts Kit | Complete AR-15 Lower Parts Kit (LPK) with Fire Control Group, Grip, and Milspec Trigger Setup |
| Stock Assembly | 6-Position Adjustable Carbine M4 Stock with Buffer Tube, Buffer Spring, Castle Nut, and Receiver End Plate |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
Left-handed enthusiasts wanting a compact visual and physical properties of a short-barreled tactical setup choose this model to bypass long federal application wait times. The side-charging mechanic simplifies weapon clearing when run with large optics, while keeping the ejection footprint completely mirrored away from the eyes.
Shooters seeking a flat-tracking firearm setup choose the mid-length configuration to reduce muzzle rise during rapid shot strings. Bypassing the traditional charging handle pull path allows left-handed operators to run immediate action drills faster under intense stress scenarios without taking their eyes off target.
Custom gunsmiths aiming to update a standard small-frame stripped lower into an innovative, highly functional left-handed utility tool select this package. It bundles all critical assembly steps together, providing proper component matching out of a single drop-in assembly array.
| SKU | P2ALNR556GFS12MID137-BA-KIT-PW |
|---|---|
| Barrel Length | 13.7 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
