I use a laser on my pistol caliber carbine (9mm) in USPSA and steel challenge competitions. The most popular one is the Crimson Trace 206. As said above the closer mounted to the bore the better. BUT, they have their limitations. Because of the laws ones sold in the us have to be below a certain brightness level. You can get some cheap ones from China that are brighter but they're above that limit. This makes them hard to see in bright light, plus, unless the target is pretty close you spend time trying to find it. Once sighted in for a certain distance they can be very accurate. But things forward or past that distance you will have to know your hold over/under depending on how flat your gun shoots.FWIW, I don't think they would be all that great in hunting situations, but I've never tried so...One more thing, if you want to see how bad you shake, put a laser on and aim at a target.
Yes, my laser is green.
Do you still have yours? Thanks-Wyo