I am looking for a forward clicky to fit an UltraFire 503b. I have googled til my eyes have crossed but I'm still coming up zilch. I purchased and installed a Solarforce forward clicky only to find that it wasn't compatible. I tried then to install the whole Solarforce tail cap only to find the threads incompatible. So guts are incompatible and tail cap/threads incompatible.
Any suggestions?
Thanks
