I just posted this same question in handguns accessories forum.

Is there a way to mount one of these holsters onto a military issued LC2 web belt? I know I could mount it down on the thigh using a 6004/6005 but I prefer to wear the holster on my belt since that is where I am accustomed to carrying my sidearm. Thanks.

A military web belt is 2 1/4" wide.  If the belt bracket for a 6280 will fit that width, then you may be able to get it to work.  However, if you aren't married to the USGI belt (that is, don't need it with grommets), then look at picking up a SpecOps Brand, Blackhawk, Eagle, or other company's duty belt in green.  They are a little thinner (1 3/4 or 2") and may give you some more options.