Mech Tech Carbine conversions offers the only kit which converts a Glock handgun into a carbine without making it an NFA weapon. As the Mech Tech CCU system suggests the Glock owner can get creative and design a carbine system to suit their taste. The Mechtech carbine system is a group of accessories designed to enhance the mid range performance of the Glock handguns. The primary conversions is called the "Basic Unit" which a quick and easy replacement of the Glock's upper. Although the below image does not show the included Muzzle Break which is permanently attached to the 16" barrel. The Basic Mechtech conversion is not a firearm, therefore does not require any special federal licenses or Tax Stamps. The Basic CCU system features a mounted scope base which can be easily replaced with any of the Mech Tech sight rails. We offer the Mechtech Carbine conversion system in the Basic System, Telescopic Stock and the new AR15 style collapsible stock system.