Made from polymer material, this allows you to improve the look and functionality of the replica. The kit is compatible with most of the G17 / 18/19 series pistols available on the market.It is Mounted to the replica using a thew rail under the gun barrel, and secured with an Allen screw. It has 22mm RIS / Picatinny rails on both sides , allowing the gun to be equipped with additional accessories , such as a flashlight or a laser target pointer.The grip has a slot for an additional pistol magazine , which allows you to have a second magazine within easy reach and instant reloading. By adding the stock (FAB Defense), the conversion allows you to turn the G series replica into an effective, stable and compact pistol-carbine .