I understand your cause for concern, but I'm not completely new to this type if firearm; I did a lot of research on the M1917 Enfield Rifleicon when I first got this. The bolt will not even close at all when the safety is to the rear, and will only close when the safety is fully forward. I know that when the safety is forward, the rifle is able to shoot, and with the safety back, the bolt gets locked and the trigger is SUPPOSED to become inoperable. Like I mentioned a few posts up, the problem seems to be that the trigger group, firing pin, firing pin spring, and cocking piece are all mis-matched. Upon inserting an unmodified M1917 bolt, the bolt and safety functioned just fine.