I got it at at a licensed firearms dealer, brand new, and I applied for my permit. I paid $485 for it and I'm not firing it unless for serious self defense until I'm really sure I am comfortable with it. Now for some seriously basic but "safer than sorry" questions... On a non revolver, magazine style semi auto like this... if I put in a loaded mag., but do NOT slide it back to put a round in the hole, I cannot shoot a round, correct?. I thought I remember when I shot my dad's .357 magnum revolver, one pull of the trigger cocked the hammer and the next squeeze pushed out the bullet. There was no "priming" so to speak; it was all trigger. And my recollection on that may be wrong, too. I was thinking if I pull the trigger ONE time on the Glock it would push a round to the chamber. Apparently, that isn't the case with a clip; you have to manually load a round into the chamber. Then, each pull of the trigger AFTER that fires a shot until the magazine is empty... I stripped the EMPTY gun and noticed the copper lube from the factory. The salesguy was pretty laid back about cleaning/lubing the gun. I was surprised that he was like "Just dab a drop of WD 40 on each rail, massage it in." I'm the kind of guy who actually uses a torque wrench on oilpan bolts. So, should I touch where the copper lube is or just put pistol oil (WD 40 just makes me uneasy on a gun) over the factory grease? How careful do I need to be with the guts on this piece? Eventually, can I just wipe it all dry and lube the necessary parts? Or is that a no-no when dealing with factory oil? I know I'm on this, but I an cautious and didn't want to ask the salesguy stupid questions when purchasing... TIA.