There is a member who is talking about machining some sort of rail and gluing it to the lower. Most of us here dont feel it is feasible, and encourage people who are dead set on lasers on buying the trigger mount setup. Just make sure the laser is actually adjustable, not one of the super cheap ebay ones. There are people selling the adjustable ones there as well, just make sure it is the trigger mount and has the two adjusting screws on the head.
I never have any luck with the search function either, lol! :dead: