Since 1985, GSL has designed suppressed weapons systems that are used by most Government agency units throughout the world and designed advanced systems to ensure their safety and protect their hearing. In addition, they have worked with a wide range of local, state and federal Law Enforcement and Government agencies that depend on their innovative, durable and proven designs. One of the companies GSL worked closely with was Gemtech. GSL founder Greg Latka designed the widely successful Submachine gun line of supressors, The Raptor-II, Raptor-40, MOSSAD-II, VIPER, and the MK-9K. Since Gemtech's sale to Smith and Wesson they have since discontinued these supressors. GSL has redesigned these legendary supressors with their new Sub-Gun line up.