LOL yes it is. And I have a few of them. (and if this fails and/or I butcher the GTL 10 beyond repair, I'll be getting another TLR-1... ) However, there's a couple of reasons to at least try and modify a Glock light. 1. There seems to be at least some anecdotal evidence that the GTL 10/11 lights don't cause the frame flex/weight issue which can cause cycling issues in certain Glocks. 2. To embarrass Glock into getting with the program and sticking an LED in there. 3. Some people might want a Glock light, just for the sake of being "correct" in keeping the same look/brand together, but want LED output. 4. If you look around, GTL 10's can be had for $50 at times, and from sources like Deal Extreme, LED modules go for as little as $8. If you don't mind your own skull sweat/effort, that's still almost half the price of a TLR-1.