I was actually looking at the LaserMax (about 2/3 down the page)
http://www.topglock.com/catalog/lights-lasers.htm
And wondering if it would work with an airsoft Glock, then I found this one:
http://www.topglock.com/catalog/lights-lasers.htm#H2
Which should work no problems, looks like a pretty sweet system. Dunno how much money you guys have to spend on it.