The Proof Research 6mm ARC 1-7.5 Twist 14.5" Stainless Steel Barrel is a precision-built AR-15 barrel designed for shooters who demand consistent accuracy and dependable performance. Machined from double-stress relieved 416R stainless steel with a medium contour and threaded 5/8-24 muzzle, it offers a balanced profile that manages weight while maintaining rigidity for repeatable shot placement.

This 14.5" intermediate gas system barrel is tailored to the 6mm ARC cartridge, using a 1-7.5 twist rate to stabilize a wide range of modern projectiles. Its stainless finish resists corrosion and makes cleaning straightforward, ideal for extended range sessions, varmint work, or general-purpose rifle builds. Proof Research’s meticulous rifling, lapping, and borescope inspection process results in a barrel that supports tight groups and reliable cycling, reflecting the brand’s focus on precision craftsmanship.

Key Features:

• Manufacturer: Proof Research
• Model: 6mm ARC 1-7.5 Twist 14.5" Stainless Steel Barrel
• Caliber: 6mm ARC
• Condition: New
• Barrel Length: 14.5"
• Threaded Barrel: Yes, 5/8-24
• Weight: Approximately 2.25 lbs