Proof Research Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel 26 inch Competition 1-7.5 Twist 5/8-24 Silver. Every PROOF shouldered pre-fit arrive chambered and threaded for an easy install - simply torque the barrel on verify headspace and you're ready to shoot Specifications for Proof Research Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel: Manufacturer: Proof Research Color: Silver Finish: Stainless Steel Caliber: .25 Creedmoor SRP Projectile Caliber: .257 Caliber Barrel Length: 26 in Barrel Material: Steel Barrel Twist Rate: 1-7.5 Barrel Profile: Competition Threads per Inch: 5/8x24 Gun Make: Stiller Gun Model: Stiller Wombat Weight: 7.5 lb Gun Type: Rifle Flutes: No Barrel Shank Diameter: 1.25 in Application: Shooting Features of Proof Research Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel Lightweight - Up to 64percent lighter than traditional steel barrels of similar contour Extreme Temperature Resistance - Improved heat dissipation for cooler and longer lasting barrels Unprecedented Durability - Wrapped with high-strength aerospace-grade carbon fiber impregnated with a proprietary matrix resin Long-Lasting - Excellent erosion wear characteristics and corrosion resistance Extreme Pressure Resistance - An optimum combination of high tensile strength along with requisite toughness to withstand extreme chamber pressures encountered during firing Package Contents: Proof Research Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel What firearm models does the manufacturer say Proof Research Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel is compatible with? The manufacturer suggests that Proof Research Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel is compatible with Stiller WombatProof Research 145807: Stiller Steel .25 Creedmoor SRP Threaded Rifle Barrel 26 inch Competition 1-7.5 Twist 5/8-24 Silver 145807