Romanian 1964 RPK barrels based off an original Romanian RPK blue print. These are US 4150 Vanadium Steel barrels that have been chrome lined by Green Mountain's provider. The barrel is threaded, extractor is cut, and the side handguard retainer slots are cut in place. Due to popular demand from builders we left off the gas port hole and the top handguard retainer notch so the builder could be sure that was perfect once they align everything. These barrels are in the white on the outside and will still need a finish coating.