Okay gang, fulfilled one of my long-term flashlight goals. Assembled the mythical Blackhawk Gladius / Surefire FM34 beamshaper combo...
Obesessed with this combo as shown on TigerhawkT3's site from the golden age of CPF way WAY back when, always wanted to try this out with one of my modded specimens. The FM34 is the impossible to find diffuser/beamshaper for the 6P series. After combing through many clone and aftermarket versions that were close but not exactly right, I snagged a genuine Surefire one in WTB from Euroken. One word of caution that others have said about this combo is to be careful with closing the latch as the bezel is a hair thicker than the 6P for which the FM34 is designed. I first tried it on my 6P and it was smooth as buttah, snapped on perfectly. My first attempts on the Gladius took an alarming amount of effort and the pieces started splaying out in weird directions. After some fiddling, I realized that a very thin piece of wire would give just the right amount of slack. I carefully slid the original pin out from the latch and threaded a piece of wire (a beading pin) and bent the straight end into a loop to hold it. Fits perfectly.