Gun was heavy/refusing to cock. Upon inspection, the roller bearings and cocking arm had surface rust, from getting wet the day before (i know it was clean before that, it was only apart 2 weeks ago). Think the roller bearings were locking up, although Brian's tip of moving cocking tube with fingers worked on opening, there wasn't enough space to close it in that manner. So, questions... 1) how many bearing should move. I've got the 2mm allen bolt (i think it's allen) off and there's a lower bearing with a / angle cut in for the allen bolt, then one above. Does the upper ring move or is there just two bearings? 2) what keeps them moving and non rusty but doesn't wash or fall onto the hammer? 3) and it's just really a couple of metal collars that sit over a pin, rather than an actual roller bearing?