Take the grips off. #### it to compress the mainspring. You need to make a clamp to put on the spring to hold it in the compressed position. I used a fencing staple, you could use needle nose vise grips. You leave the clamp compressing the spring until it is reassembled. Remove the spring, and now you can remove rebound lever, trigger, hammer, etc. Be careful you don't lose the tiny leaf spring that holds the cylinder catch on the trigger assy. It is not clearly shown in the illustration above.