ok, ive never seen a vid on it but if there is one or its a simple answer please excuse my stupidity lol. whenever u buy a weapon off the way u see the price of the weapon, the ammo and the upgrade. well what i wanna know is how do you upgrade?? is it something different then pack a punch?? if it is then i already know i have to have to pap'd weapons. what i dont know how to do is use my pap'd weapons and upgrade them into one awesome weapon. how the hell do i do this??? if there is a vid on it plz feel free to comment with the link. thanks in advance