Mervyn, Tom an Keenan, Thanks for your kind comments. I?m sorry for having expressed my frustration so openly, but I couldn?t help. The feedback was so great when I posted this Royal MM34 on collectable guns-oriented forums that I wrongly hope to read the same here ? which is a more medal oriented board. According to a copy of the MM34's instruction book that was sent to me by a fellow collector the rate of firing is the following: Position 1: 2-3 shots per second Position 2: 5-6 shots per second Position 3: 9-10 shots per second The device works as an additional recoil spring, slowing the rate of fire by increasing the tension in that piston. Douglas