pretty sure they used three oring shafts, like dye and shocktech. His hoses are right.
It sounds to me like your sear isn't catching the lug. Take off any air and try to manually cock the hammer by pulling the bolt back. If the hammer catches on the sear and stays locked back, it's all good.
If the hammer just goes back forward, remove the bolt, and using a 1/8th inch allen key, tighten the set screw that's in the top of the hammer one turn at a time until it catches the sear.
Then you can fine tune it, you want the hammer to fall near the front of the trigger pull, but not so close that it's unreliable. Tightening it will make the firing point later in the pole, loosening makes it trip sooner.