I had to fix the trigger assembly on a Hatsan 125. The half moon broke off at the pin hole. The hardest part is having pins fall out as you are assembling the components in the case.
To solve this problem after you insert pin take a small piece of modeling clay using it to hold the pin in place, keeping you from having to hold them as you install each piece. you can leave the clay as you install the assembly into the rifle. Only one needing removal the pin that guides the safety. When everything is put back together you remove the clay on other pins.
Hope this helps . Example below. Watch Mike's video for complete instructions the clay will help in the job. https://youtu.be/ljcTTfjP6KI
To solve this problem after you insert pin take a small piece of modeling clay using it to hold the pin in place, keeping you from having to hold them as you install each piece. you can leave the clay as you install the assembly into the rifle. Only one needing removal the pin that guides the safety. When everything is put back together you remove the clay on other pins.
Hope this helps . Example below. Watch Mike's video for complete instructions the clay will help in the job. https://youtu.be/ljcTTfjP6KI