Have you adjusted the screw just in front of the auto trigger lever? That's supposed to shorten the trigger pull, if you go to far it'll bind when auto triggering (note I've not got one just read the manual online).I have and I haven't, I dont intend on slam firing plus I think I need to change my hammer lug to a square one, as when I adjust for autotrigger it is to far back on the trigger pull.