Having a problem with the reassembly of my 40 Shield. The slide wants to hang up a fraction of an inch before the the slide lock and take down lever lines up with the recesses in the slide.. Feels like it is hitting a hard stop, absolutely will not go back any further.If i keep racking the slide, it will eventually go back far enough to engage. I can not figure out what is stopping the movement. Anybody else have this problem?