"The Gemtech Lunar 9 DT Suppressor is a versatile and affordable silencer for a wide range of 9mm and subsonic .300 BLK pistols, carbines, and rifles. The innovative baffle design allows it to be converted from its full-length configuration to a shorter configuration for scenario where length and weight are more important than maximum sound suppression. In the short configuration, it's just 4.7"" long and 7 oz. In the full-length configuration, it's 7"" long and 10 oz. Both configurations reduce decibels to hearing-safe levels. The Lunar 9 DT (Direct Thread) Silencer features a stainless steel blast baffle, aluminum baffles, and aluminum main tube. It ships with a 1/2""-28 LID assembly for easy mounting. Ideal for 9mm and subsonic .300 BLK pistols, rifles, and carbines Can be converted from full-length to shortened configuration Includes a 1/2""-28 LID assembly for easy mounting"