Linear comp design diverts muzzle blast forward in the Midwest Industries Pistol Blast Divertor. Constructed of tool steel with a phosphate finish 5/8-24 threads for .30 pistols or rifles 4.1 oz weight 1.75 inches length 1.090" outside diameter Includes new crush washer 100% made in the U.S.A. Lifetime Warranty Mfg: Midwest Industries, Inc.