PRO2A 8.5" 40 S&W 1/16 Pistol Caliber Melonite M-LOK Upper Kit

Description

The Pro2A Tactical 8.5-inch .40 S&W Pistol Caliber Complete Upper Kit bundles hard-hitting velocity and modular handling into an all-in-one rifle conversion layout. Hand-assembled and quality verified in Georgia, this package includes everything required to convert a standard stripped lower receiver into a functional personal defense weapon or short-range tactical carbine. Paired with a heavy-weight blowback bolt carrier group and specialized heavy buffer hardware to confidently manage the cyclic pressures of the .40 Smith & Wesson cartridge, it eliminates compatibility guesswork for a streamlined build.

Key Features

• All-In-One Transformation Package: Bundles a fully populated 8.5" upper group, matching nitride blowback BCG, standard charging handle, complete lower parts kit (LPK), and a full blade assembly hardware package.
• Optimized Velocity Run: An 8.5-inch barrel squeezes exceptional downrange ballistic velocity out of the .40 S&W cartridge while maintaining a compact profile for defensive applications.
• Straight Blowback Simplicity: Engineered completely without gas blocks or gas tubes, dropping complex mechanical failure points to guarantee steady feeding and extraction cycles.
• Premium Melonite Integrity: Treated inside and out with an ultra-hard Melonite finish, maximizing barrel bore life and defending against corrosive elements while offering effortless cleanings.

Technical Specifications

Why Choose This Product?

Transitioning into a hard-hitting .40 S&W platform requires precise chamber engineering and extraction timing due to the pressures of straight blowback cycling. The Pro2A 8.5" .40 S&W Upper Kit addresses this challenge entirely by pairing an enhanced feed cone—optimized to smoothly route flat-nose training rounds and modern defensive hollow points alike—with a perfectly matched heavy buffer assembly. By combining all build components in a factory-headspaced package, it erases standard configuration troubleshooting. It is the ultimate turnkey choice for security-minded operators demanding serious short-range power.