http://www.fallout3nexus.com/modules/members/index.php?id=341894 I don't see it. The only M1911 I can find is http://www.fallout3nexus.com/downloads/file.php?id=785, and it doesn't have a laser.
So, my guess is it's brurpo's with http://www.fallout3nexus.com/downloads/file.php?id=3388 - am I right?
edit: Nope... "Q) What about mods that change the appearance or stats of the vanilla weapons in Fallout 3? Are they compatible with WMK?
A) I can't give much more info than in the above Q&A point, but some general guidelines: When it comes to appearance-altering mods, WMK should work fine alongside those - but you'll likely notice that the modified weapons will look like the vanilla Fallout 3 weapons (only with the relevant attachments/modifications, of course). Mods that retexture the existing weapons should work just fine though, for the most part. As for mods that change weapon stats; if they do this by directly editing the base weapon objects then it should work fine alongside WMK (as long as they don't change the ObjectIDs), but again the modified weapons will not mirror those changes."
Edit#2:http://www.fallout3nexus.com/downloads/file.php?id=4448 + http://www.fallout3nexus.com/downloads/file.php?id=3388 via http://www.fallout3nexus.com/downloads/file.php?id=4968 perhaps?