Vega Force Company has released the Barrett M468 Conversion Kit for you to convert your Marui/Marui Compatible M4S-System into a Barrett Model M468 replica. The real Barrett Model M468 is a high performance rifle that uses the 6.8 Remington SPC. The M4S-System already gives you a free-floating barrel and is optimised for use with optics, as it is equipped with a SIR accessory mounting system.