I've got a Beretta 38-42 and the knob that you pull the bolt back screws down so you can tighten it or loosen it. It hasn't caused any issues, but a friend has one and he says his doesn't move at all. Is that normal movement or should I do something to lock it in place? I just screw it down so it's snug but the bolt moves smoothly. It seems like it's designed this way, but I'm unsure.
It runs great: https://youtu.be/ZqAp5ESimCo