I picked up a 2200 Magnum receiver case off EBay. After a quick cleaning I inspected the mounting threads to ensure non were stripped. To my surprise and amazement all 3 have never been tapped. This is an unused receiver, a virgin, if you will. I have the rest of the parts to complete the receiver section including the tapered barrel shroud so this is another project for this winter. Possibly an MF-2200 Magnum, AKA "The Double Magnum". Do you feel lucky?
2 model 2200 has a straight barrel shroud well mine does as does all the screen printed ones I've seen