OK, here's a question for someone more knowledgeable than I am on the workings of the ROA. I have an older, well used but good condition ROA. SOMETIMES.... if I function the revolver in a less than positive manner it will lock up - tight! - and the only way I can get it functioning again is to remove the cylinder and re-install it. I am at a loss to find the cause, as when I remove the cylinder, the problem goes away. Hopefully, someone can tell me what the problem is and how to correct it. Emery