I have an opportunity to purchase a STEN MKII, in great working order, decent condition, w/7 mags, at a decent price. Well below market value. The owner is in bad need of $. It is being offered through a friend. I do not know if it has ever been registered, or even if it is warm, but I don't believe so. My friend would not put me in that situation. Although the registering part is unknown. Here are the questions. 1) If it has not been registered, can I get it done? If so, how? 2) If this weapon is stolen, what should I do, walk away? Report it? 3) Finally, if this weapon has been converted to semi auto only, does it still qualify as a "Machine Gun", since the auto feature has been eliminated.? 4) How can I run the numbers on this weapon, so I can get the background, previous owners, etc.? I have a chance to turn this over for a little profit, after I play with it awhile, but I won't come near it if I can go "up the river".