I'm in the process of figuring out how best to mount a light to my RDB. It has top and bottom 1913 rail, but the bottom rail is not an option since I like to put my off hand as far forward as possible--which ain't that far on a bullpup. I bought a cheap light/offset mount combo and have mounted it on the top rail. So far I'm liking this set up, but the pressure switch is a problem. There's no good place to zip tie the switch, so I'm thinking some kind of adhesive/tape. I'm wanting it to adhere to a smooth portion of the polymer handguard...any suggestions? For those of you who have done something similar, what did you use?