i just found that out. When i pull back the trigger that part #265 is stiff. when i push it forward it becomes loose. then if i pull the trigger it still does not release, but i can release the hammer manually. when i push that hammer release part the hammer comes forward about 1/4 of the way, then when i push the trigger it comes forward totally and the trigger becomes stuck in the pushed position. Then i pull the hammer back and start all over again

What is wrong with it?