Proof Research 6mm ARC 18in AR-Style Barrel 1:7.50 Twist

Description

Product Overview

The Proof Research 6mm ARC 18-inch AR-style barrel is built for shooters who want durable performance under high chamber pressures while maintaining excellent accuracy potential. Its carbon-fiber composite construction helps reduce heat retention and improves stiffness, and the engineered rifling and twist rate are matched to 6mm ARC ballistics. The +1 length gas system and 5/8-24 tpi muzzle threading make it a strong choice for modern AR builds and suppressor-ready setups.

Key Features

• 5/8-24 tpi muzzle threads for common muzzle devices and suppressor attachments
• Carbon-fiber over steel construction for stiffness, corrosion resistance, and strong heat-management
• 1:7.50 twist rate for stabilizing a wide range of 6mm ARC bullets
• 4-groove rifling for consistent, precision-oriented barrel dynamics
• +1 length gas system for reliable AR cycling characteristics in appropriate build configurations
• 18-inch 6mm ARC chambering for flat-shooting performance with compatible 6mm ARC loads

Upgrade your AR build with a Proof Research 6mm ARC barrel designed for precision and durability—ideal when you want match-capable performance with modern barrel construction.