I have often wondered about the Thompson in the fact of being carted around in all sorts of conditions when stuff was going down and if they suffered from the ingress of debris into the action I know it was too late for WWI but I just wonder how the Thompson would have gone in a place like Flanders or the Somme in winter given the very tight tolerances it was made to also did the MP - 40 & PPSH fire from open bolts TIA