On the side of the gun , what kind of mount is this with the flash light. Also when you have the ATI stock installed, the rail on the bottom is included with the regular stock or is that after market? Also is the top rail "stock" or a add-on? This is a sweet looking gun and I am in the process of getting a hi-point with a ATI stock from a forum member, I want mine to look excatly like this one. I know where to get the barrel shroud and red dot. Just not sure about the bottom rail and what is mounting the flash light.