I am building my first AMD65 using a Vulcan receiver and a kit I got from TAPCO . The problem I am having is the trigger does not pull far enough for the hammer to lock in place . From what I can figure I have a double hook trigger and the receiver is made for a single hook . What is the best way to fix this without ordering a new trigger right away file the receiver or the trigger ? Or is there something else wrong that I am over looking ?