Sometimes when I rack the slide back to load the 500, the hammer doesn't lock back;/down in the ready to fire position, I'm concerned it will ride the bolt and fire when pumped, and fire when the slide is pushed forward. I'm only have this issue after replacing the trigger pack with a new one (the old one was cracked from the previous owner). Could it be the bar next to the hammer, that points forwards, not being pressed fully down, resulting in the hammer not locking back? If this bar is the problem, other than adding some epoxy to the top of this bar to make it taller, is there any better solution?