Proof Research Accuracy International Pre-Fit Barrel Steel 300 Win 26 inch 1/10 Twist 5/8x24 Thread M30 Breech Thread Silver. These Rifle Barrels made by Proof Research are crafted from pre-hardened chromium stainless steel (416R) that is rugged and lightweight to ensure you can bring these down range with powerful calibers. Proof Research Accuracy International Pre-Fit Steel Barrel Threads use a cold-hammer rifling method to guarantee a precise shot with each and every shot for many years to come. Simply put this barrel will deliver premium performance to those who need it most. Install a Proof Research Accuracy International Pre-Fit Threaded Barrel to greatly enhance your precision with your rifle. Specifications for Proof Research Accuracy International Pre-Fit Steel Barrel: Manufacturer: Proof Research Color: Silver Barrel Material: Steel Threads per Inch: 5/8x24 Gun Make: Accuracy International Weight: 4 lb Package Contents: Proof Research Accuracy International Pre-Fit Steel Barrel What firearm models does the manufacturer say Proof Research Accuracy International Pre-Fit Steel Barrel is compatible with? The manufacturer says that Proof Research Accuracy International Pre-Fit Steel Barrel is compatible with Accuracy International AXMC Accuracy International AT Accuracy International AXProof Research 109649: Accuracy International Pre-Fit Barrel Steel 300 Win 26 inch 1/10 Twist 5/8x24 Thread M30 Breech Thread Silver