Hi, new to me my first Glock a gen 2 19. I believe low rounds fired, box,two original mags. I do not know anything of its past other than the man I got it from has had it for 12 years. My pictures are poor, but does this need the upgrade? Do you think this is a low round pistol, or one that has been refurbed by Glock. Serial number is NL7xxUS. It still has copper colored antiseize on the rear slide. Other than a general clean, and lube anything I should do before firing? Let me know what you think as I know next to nothing of Glocks.