PROOF Research 128664 6mm ARC Stainless Threaded AR-Style Rifle Barrel

Proof Research 128664 AR-Style Barrel 6mm ARC 16" Stainless Steel Finish & Material Rifle Length with Treading & .750" Gas Journal Diameter for AR-Platform

The PROOF Research 128664 Traditional Steel barrel is designed for AR-style rifle platforms chambered in 6mm ARC. Built with a stainless steel construction, this rifle barrel delivers a durable, pressure-resistant foundation for shooters seeking dependable performance and long-lasting service. Its practical configuration makes it well suited for custom builds, replacement applications, and precision-focused rifle setups.
The barrel features a threaded profile for compatibility with appropriate muzzle devices and accessories. It uses a rifle-length configuration and is built with a 1:7.5 twist rate to support the 6mm ARC cartridge. The stainless finish provides a clean, functional appearance while offering a durable surface for demanding use. This model does not include sights, making it a suitable choice for builds that use an optic or other sighting system selected by the owner.
As part of PROOF Research’s Traditional Steel line, the 128664 barrel reflects the brand’s focus on consistent manufacturing and robust rifle components. Its AR-style design supports integration with compatible platforms, while the threaded barrel configuration adds flexibility for customizing the muzzle end of the firearm. Whether used for a new build or a component replacement, this PROOF Research barrel provides a dependable option for shooters who value durable materials, practical features, and cartridge-specific design.

Features:

• Chambering: 6mm ARC

• Platform: AR-style rifle

• Construction: Traditional stainless steel for durability and pressure resistance

• Twist Rate: 1:7.5

• Finish: Stainless

• Configuration: Rifle-length barrel

• Muzzle: Threaded for compatible accessories

• Sights: None

• Part Number: PROOF Research 128664