Are there options for green lasers with an adjustable point of aim? I'd like to attach a green laser to a rifle for aiming, but commercial options are limited to 5mw, and I want it to be as bright as possible for use during daytime (without risking eye damage from looking at the reflected dot. So probably 50mw or so). I'm hoping there's a way to buy or build something like this that's durable enough for the intended purpose.