PRO2A 20" 6mm ARC 1/7.5 Rifle Length NR Side Charging Melonite M-LOK AR-15 Upper Kit

Description

The Pro2A Tactical 20-inch 6mm ARC Non-Reciprocating (NR) Side Charging Complete Upper Kit includes everything required to convert a standard stripped lower receiver into a premium, ergonomically optimized precision rifle system. Hand-assembled and quality verified in Georgia, this all-in-one conversion package swaps out the traditional rear charging architecture for an advanced, static side-charger mechanism. Paired with a velocity-maximizing 20-inch barrel, rifle-length gas curve, complete lower parts kit, and stock hardware, it offers a comprehensive drop-in solution built for sub-MOA mastery.

Key Features

• Non-Reciprocating Ergonomics: Features an advanced side-charging upper receiver with a handle that remains fully static while cycling, preventing optics interference and keeping your eyes fixed on downrange targets.
• All-In-One Transformation Package: Simplifies your build process by including a fully assembled side-charging upper group, matching nitride BCG, lower parts kit (LPK), fire control group, and a complete 6-position stock assembly.
• High-Velocity 6mm ARC Ballistics: Harnesses the maximum velocity threshold of the 6mm Advanced Rifle Cartridge out of a 20-inch system, establishing ultra-flat trajectories and match-grade wind resistance.
• Tuned Twist & Cycling: Employs a rapid 1/7.5 twist rate engineered to stabilize heavy, high-BC match projectiles, softened by a smooth-cycling rifle-length gas system.

Technical Specifications

Why Choose This Product?

Upgrading a precision rifle build shouldn't require compromising on structural ergonomics or headspacing compliance. The Pro2A 20" 6mm ARC NR Side Charging Upper Kit completely unifies your components from the factory, mating a perfectly matched side-charging bolt carrier group to an ultra-hard Melonite treated barrel. The side-mounted charging layout provides crucial clearance for oversized long-range scopes while significantly improving cycling leverage from prone positions. It is the definitive option for target shooters, long-range competitors, and predator hunters demanding full custom-tier rigidity in a turnkey build package.