This book doesn't even mention screwdrivers! I mean......., screwdrivers is screwdrivers the whole world over.

You're right about the unbreeching of the Thompson BAR. That's why I mentioned the brutal bit. We made a set of slotted (for the grip mount bar) barrel clamps and it still didn't break away. Cut the grip rail off (we had a few new lend lease spare parts) and got REALLY brutal......., as only a REME recovery mechanic and a blacksmith can..... A loud bang and off it came.