The SOLGW PRECISION barrels are unquestionably the most accurate barrels we've ever offered. Optimized for accuracy, the SPR contour and 5/8A-24 threads at the muzzle are by no means lightweight, but are built with accuracy in mind.The PRECISION series are 416R stainless steel, black oxide coated barrels. These barrels are also polygonal rifled with a 3 groove, 1:8 twist bore.Please note that these barrels will have a shorter lifespan than our 4150CMV barrels, however our warranty still applies. If you can manage to shoot one out, we'll still replace it for you free of charge.Specifications:Manufacturer: Sons of Liberty Gun WorksBarrel Profile: SPRChoke Type: RifledLength: 12.5 in, 14.5", 16", 18" and 20"