mike, When I googled "m3 greasegun parts" it returned the IMA pages showing parts kits for 399.00. Upon going to their current website I don't see it either...it must have been an older web posting. Yes, my M3 it a fully transferable C&R submachinegun. The old fella I got it from was willing to give it to me to 'get it out of his house' but we managed to come to terms that were agreeable to both of us. I consider myself to be very lucky and the gentleman to be very generous. I did remove the wire stock and after a bit of gentle persuading it works much better with just a bit of binding. The barrel nut does have flats on it; I'll add it to my parts I'm searching for. Thanks to all for all your replies and assistance. jim