Welcome Troy. Mike is right about those parts. It is the little roller and bushing that rides on the cocker arm post that guides the cocking mech through the inside of the stock. I had the same thing happen to me after changing out a spring in a Gamo S1K. A little black roller appeared on my workbench after I put it back together. Jeff, AKA "Longislandhunter" informed me that it came from the cocking arm.
Well before my question at that time I lost that roller and the gun still cocks OK but with a bit of resistance. Just proves that PARTS IS PARTS, but they do mean something in the long run! :emoticon:
Greg