The hammer cocking shaft should have a single scribe mark on the right end. It takes a little force to assemble it with the scribe mark to the left. The reason I know this is, I bought a decent G Grade and discovered that it was reassembled incorrectly. It took some force to get it apart. I carefully stoned and polished the shafts and hammers to remove the damage. Good Luck!

GMC(SW) - USN, Retired (1978-2001)