Upgrade your AK-47 build with the precision-engineered Green Mountain 8x57mm AK-47 Barrel. Designed as a direct M76-style replacement, this 21.5-inch heavy-profile barrel delivers reliable performance in the powerful 8x57mm Mauser cartridge while maintaining the rugged durability expected from Green Mountain Rifle Barrel Co. Key Features Chrome-lined bore with phosphate exterior finish for superior corrosion resistance and extended service life Heavy barrel profile enhances heat dissipation and improves accuracy during sustained fire 1:10 twist rate optimally stabilizes a wide range of 8x57mm projectiles for consistent downrange performance 14x1 LH muzzle threads provide compatibility with common AK muzzle devices and suppressors Yugoslavian M76-inspired design offers authentic aesthetics and proven ergonomics for tactical or sporting builds Technical Specifications Barrel Length: 21 inches Overall Length: 21.5 inches Cartridge Compatibility: 8x57mm Mauser Platform: AK-47 Finish: Phosphate with chrome-lined bore Twist Rate: 1:10 Muzzle Thread Pattern: 14x1 LH Gas Block Journal: N/A (direct replacement configuration) Weight: 40 oz Why Choose This Green Mountain Barrel Green Mountain barrels are trusted by builders and manufacturers for their consistent quality and accuracy. The chrome lining protects against the high pressures and temperatures of 8x57mm loads, while the phosphate finish resists wear in demanding environments. Whether restoring a classic Yugoslavian M76 or creating a custom long-range AK, this barrel provides the foundation for reliable function and precision shooting. Benefits for Your Build Improved accuracy and barrel life compared to standard thin-profile barrels Reduced maintenance thanks to the durable chrome-lined interior Authentic M76 styling for historical or collector appeal Versatile threading for modern accessories without custom gunsmithing