Discover the precision-engineered MSR Barrel 5.45x39mm 8.25-inch designed specifically for Arsenal platforms with a 22mm (.866) trunnion. This hammer-forged, chrome-lined barrel delivers exceptional durability and performance for custom Krinkov-style builds or short-barreled rifle configurations in the versatile 5.45x39mm caliber. Key Features Hammer-forged construction for superior strength and consistent accuracy under demanding conditions Chrome-lined bore provides enhanced corrosion resistance and extended barrel life Precisely machined for 22mm trunnion compatibility, ensuring a secure fit on compatible Arsenal receivers Includes gas port holes for reliable operation in gas-operated systems 8.25-inch overall length optimizes maneuverability while maintaining ballistic effectiveness 1:8 twist rate stabilizes a wide range of 5.45x39mm ammunition Technical Specifications Caliber: 5.45x39mm Length: 8.25 inches Trunnion Diameter: 22mm (.866 inches) Finish: Chrome lined Platform: AK-series (compatible with Arsenal 5.45 builds) Twist Rate: 1:8 Muzzle Threading: None Gas System: N/A (port holes included) Why Choose This Barrel Builders seeking a factory-quality short barrel for suppressed or compact 5.45x39mm AK variants will appreciate the combination of Bulgarian Arsenal heritage and modern manufacturing standards. The hammer-forged process creates a denser, more uniform steel structure that resists wear far better than button-rifled alternatives. Chrome lining further protects against the corrosive residues common with 5.45x39mm ammunition, reducing maintenance needs and preserving accuracy over thousands of rounds. This barrel addresses common pain points in custom builds by offering drop-in compatibility with 22mm trunnions, eliminating the need for extensive machining or adapters. Its compact profile enhances handling in tight spaces without sacrificing the reliability expected from premium AK components. Ideal Applications Krinkov-style SBR conversions Compact tactical or home-defense firearms Collectors restoring or upgrading Arsenal-pattern rifles Elevate your next project with this authentic Arsenal-specification barrel engineered for longevity and precision.