Well I mentioned an idea in the chat and it got some response so I thought a thread would make things easier to keep track of. As soon as the semester finishes up I'm going to see if I can't make an LED weapon light that fits on the factory M/S rail. Now the goal of this little project is too see if I can design and make a compact, lightweight, reliable, and CHEAP weapon light. Not so much cause I want one or want to sell them, rather just to see if I can make it! Here's a brief description of what I'm thinking. 1)The unit will sit flush with the muzzle length and fit against the curve of the trigger guard and will sit no lower than 2cm from the bottom of the current rail. Width is going to be as close to the width of the frame as possible. 2) I'll probably use 4 LEDS. 18000mcd (30* focus) @4.5v but they will be run slighlt overcharged at 6v. I've got a few flashlight conversion now running similiar but with 2 of those LEDs and it is pretty dang bright. 3) Power will be from 2 MN21/23 batteries. Not sure what the runtime will be yet. But these things are small and cheap ( 2pack is $1.77 at walmart) Again, I used these in my flashlight conversion. They are roughly 2/3 the length of a AAA and are the same diameter. 4) Body material will probably be fiberglass. Why? Because I have some, I've worked with it before, a mold is easy to make, and I don't have access to fancy injection molding equipment. What I'm trying to decide on right now is: a) switch type. Momentary, on/off, combo? On light or remote pressure switch. b)reflector/lense. I'm not terribly impressed with the pattern the LED's throw on their own but I think an effective lense setup or reflector design is going to be beyond my means while maintaining the small size and low cost. I'm really open to idea's here, so chime in! Like I said though, it'll be a month or so before I get started. But I may try to get a CAD drawing done of my idea fairly soon, if that happens I'll post up a picture of it.