So ive recently been considering picking up a class 3 firearm and have been looking at a couple of options. So far however after researching the process for purchasing a class 3 firearm I'm still left with even more questions than from which I started. For starters so far the only place I know to even find a place to sell a class 3 firearm thats capable of being in civilian hands is the Rock Island Auction company and auctions were never really my thing. Is there even any other place to buy class 3 firearms? Also what about ammunition? if you purchase some machine gun such as a automatic AK-47 or something ammunition is super easy to find but if you buy a class 3 firearm that isnt a machine gun like the old field guns I see on RIA's website where do you even buy ammo like that? Because I have yet to see a gun store stock 25mm Flak shells or something like that. Since purchasing a class 3 firearm is kind of a big purchase id rather have all the information first.