I have a Hammers 3-9x32 front AO thats been on my Airhawk for years with no problems.I just checked and it will focus down to 5 meters, maybe even close to 4. The front objective is marked down to 7.5 meter but the bell will turn past the mark. I've never checked to see how far off the markings are but I know that they (like most lower end scopes) aren't exactly correct.Blue