I have a couple of IR lasers, but I went the cheap route. One of them is G Sight Gladiator laser illuminator, made in China and it more or less resembles a Maglight construction wise. It is waterproof, as I've tested it in rain showers. It has windage and elevation adjustments. It's good out to maybe 300 yards, it'll go farther than that, but the beam starts widening. There's no question that an IR illuminator is a game changer, If you're going up against opponents without night vision. However, if your opponent has night vision and there's any precipitation, then the laser acts like a pointer right to you. It is pretty neat to look at the beam in any precip, whether it's drizzle, rain, snow or fog. Anyways, that's a cheap alternative (around $100) if you just want to try out an IR illuminator.