The fully complete pistol-carbine kit from Hakkotsu/APS is available at RSOV.com. This gives a CO2-SMG that you can use as primary in CQB games and you can remove the pistol from the Carbine conversion kit if you want to use it as a backup. It comes with a 22-round gas magazine, instruction manuall, and the front-rear Rhino Sights. All for US$174.99.