last weekend i purchased a gtl 21- the new glock tactical light w/ laser. i have a glock 21, so i encountered the fit problems explored on this thread. after many attempts to fit the light, and trimming the little ribs just enough to provide a firm fit to my trigger guard- i discovered i was unable to focus the beam! the bezel would not unscrew either. i found that the small pips that the bezel's cam surfaces ride on were gone! nothing like discovering your new toy is broken... i will contact glock today and post the results. tip: a mini cell-phone pouch is a secure and discrete way to carry the gtl-21.