DIRK21
I don't have any personal knowledge of this firearm, however, my records indicate thatit is a high quality, rugged handgun. It is buil from high tensile strength stainless steel. There are over 60 different rifle and pistol caliber to choose from on special order. The upper barrel can be chambered on special order.
my records also indicate that some 11 different models and quality are mfg'd
With the diferenciation in caliber on the same gun, I would surmize that only one barrel fires at a time.
HJN