I know Troy and he is a heck of a good guy. His other non-gun business really took off a couple of years ago and he has basically quit doing any gun-related work because he is so busy. All of the stuff he made is top-notch.Mine is the M50 with City of Pittsburgh on the stock. Troy at barrelxchange.com made the drums about 2008 and I don't think he makes them any more. Had to send a 20 round mag for each drum. Cost was about $350 for each drum. Keystone might be making them now. Go to machinegunboards.com for the newest info I've seen. I haven't taken any pictures and I'm in the middle of a move to Indiana so it might be a while before I can take any.