I would ask Terra at ROBARMS, and/or contact her here on this FORUM. I have not shot the VesperII, and am not sure if it uses single column mags or regular AK mags. If it can use regular AK mags I suggest you buy some Hungarian 20 rd "tanker" mags. They are handy for use at the bench or laying prone. :2cents: Shotgun News is a good sourse for goodies at a good price.