JK Army are taking pre-orders for the Prowin AR9 Conversion Kit for the Tokyo Marui M4 MWS Gas Blowback Rifle. This kit allows you to convert the M4 MWS into a 9m-style AR Pistol/PDW. This includes a CNC Aluminium AR9 Conversion kit, 3 pieces of the new version 47rds Lightweight Glock long magazines for the Marui system, and 2 reinforced loading nozzles. You'll need to buy the M4 MWS GBB separately.