The Proof Research Proof 138687 308 16.5 10Tw 5/8-24 barrel is built for shooters who demand consistent precision from a compact .308 platform. This 16.5-inch threaded barrel features a 10 twist rate optimized for stabilizing popular .308 loads, while the 5/8-24 muzzle threads make it ready for brakes, suppressors, or other compatible devices. Designed as a premium rifle barrel, it reflects Proof Research’s focus on accuracy, durability, and repeatable performance.

This model is well suited for building or upgrading a rifle intended for range work, practical competition, or hunting where a shorter, maneuverable barrel is preferred. The threaded muzzle adds flexibility for recoil and sound management, and the carefully chosen twist rate supports reliable performance across a wide range of bullet weights. Backed by Proof Research’s reputation for advanced barrel technology and meticulous craftsmanship, this barrel is a solid foundation for a refined .308 rifle.

Key Features:

• Manufacturer: Proof Research
• Model: Proof 138687 308 16.5 10Tw 5/8-24
• Caliber: .308
• Barrel Length: 16.5 Inches
• Twist Rate: 10 Twist
• Threaded Barrel: 5/8-24