The Rugged Universal Direct Thread Mount allows the Alaskan360 (and other suppressors with 1.375 X 24 thread patterns) to mount directly to the barrel of a firearm. The Universal Direct Thread Mount is available in 5 thread pitches and enables the shooter to quickly install a "universally threaded" suppressor to their firearm. Available thread pitches:5/8x241/2x283/4x24M18x1M18x1.5 Rugged Suppressors M18X1.5 Universal Direct Thread Mount DTM005