mag question, these toy tommy were made to look the real part, but the replica is off sized in many ways, depending on what mag you get it might slide in part way and then get tight or might not fit in at all. I have used in mine the real colt marked clips and some that are made by another co. for service in WW2. No markings. Remember you will have to do some work on them to actually fire the plugs cartridges properly. I would say try and get one from the outfit in england first, they are made of metal and you can't tell them from the original