I think it is very unlikely that the typical British Thompson has its original butt stock. The stocks were probably removed from the guns, disassembled, and the sling swivel relocated from the bottom to the top of the stock. The reinforcing screws were added to the front of the stock at some point along the way. Then the stock was ready for reassembly, using whatever metal was available. I doubt anyone kept track of the stock’s original metal. Once reassembled, the stocks were probably put back on the guns with no attempt to match the stock with the gun it was on when it arrived. This work was probably done on a large group of guns at once as quickly as possible. Time constraints likely resulted in all the butt stocks and metal parts on them going to guns other than their origionals, except, of course, by rare chance. Does anyone know what the exact process/procedures for this rework were.