PRO2A 16" 40 S&W 1/16 Pistol Caliber NR Side Charging Melonite M-LOK AR-15 Upper Receiver Assembly | Pro2A Tactical

PRO2A 16" 40 S&W 1/16 Pistol Caliber NR Side Charging Melonite M-LOK AR-15 Upper

Product Description

Maximize the ballistic efficiency, velocity potential, and manual manipulation speed of your pistol caliber carbine setup. The PRO2A 16" 40 S&W Pistol Caliber Non-Reciprocating (NR) Side Charging Melonite M-LOK Upper Assembly delivers custom-shop engineering directly to your PCC project. Constructed around a premium billet aluminum receiver featuring an ergonomic left-side side charger that remains completely stationary while live rounds cycle, this setup preserves absolute shooting safety. The heart of the assembly is a 16-inch 4150 CMV medium profile barrel with a specialized 1:16 twist rate, engineered for pinpoint rotational stability with standard 165-grain to heavy 180-grain factory loads. Operating on a rugged straight blowback mechanism that completely eliminates gas tubes and port erosion variables, this turn-key platform arrives fully paired with a matching side-charge blowback bolt carrier group. Encased inside a rigid 15-inch free-float aluminum handguard, this assembly drops seamlessly onto your dedicated Glock pattern or compatible pistol caliber lower receiver block.

Key Features

Non-Reciprocating Side Charging Action: Intuitively positioned on the left side of the receiver, this mechanism lets you cycle the bolt while keeping your hand secure on the main pistol grip, staying completely fixed during live cycling to prevent handguard interference or gas disruption.
Full 16-Inch Muzzle Velocities: Squeezes complete powder burn from the .40 S&W cartridge, extending intermediate downrange trajectory control and kinetic energy transfer compared to standard handgun platforms.
Tailored 1:16 Twist Stability: Precision-contoured to flawlessly stabilize lightweight defensive hollow-points up to heavy standard-weight flat-nose target projectiles.
Rugged Straight Blowback Setup: Bypasses gas tubes and cycling port parameters completely, ensuring a mechanically simple, remarkably dependable cycling stroke under heavy volume fire strings.
Premium QPQ Melonite Protection: Liquid bath nitride treatment hardens the 4150 Chrome Moly Vanadium core inside and out to maximize friction defense, absolute weatherproofing, and prolonged bore precision.

Technical Specifications

Upper Receiver	Gibbz Arms G9 Billet Aluminum, Non-Reciprocating Left-Side Charging Configuration, Right-Hand Ejection Port, Pistol Caliber Slick Side Setup, Type III Hardcoat Anodized Black
Charging Handle	Left-Side Non-Reciprocating Charging Handle (Stays static when firing)
Barrel Length & Profile	16-Inch Medium Profile
Caliber	.40 S&W
Twist Rate	1:16 Twist Rate (Highly optimized for standard weight to heavy .40 caliber projectiles)
Barrel Material	4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas System	Straight Blowback (Direct Impingement/Gas System Free Configuration)
Handguard	12-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle Device	Standard A2 Big Bore Flash Hider, 5/8x24 Thread Pitch

Why Choose This Product?

Building a reliable .40 S&W carbine often introduces component matching and extraction hurdles due to differing feed ramps and bolt masses. Pro2A Tactical removes the structural confusion from custom builds by providing a fully matched barrel and heavy blowback carrier assembly engineered to run in perfect mechanical harmony. This premium, American-made assembly delivers smooth side-charging manipulation and robust structural reliability, allowing you to share magazine and ammunition configurations with your sidearm flawlessly while maintaining a continuous cheek weld and target focus.