Best inexpensive green rail-mount laser - Barska Tactical 5mW Green Laser Sight w/ Picatinny Rail Ring

Absolutely the best rail mount green laser for the money. I've gone through a couple inexpensive green lasers and they all seem to lose zero, are nearly impossible to zero, or the instant on button fails after not much use. The one has turrets for windage and elevation adjustments that make it rally easy to zero and it seems to hold the zero really well (I'm only using on a 5.56 so not all that much recoil), the laser is bright enough to be seen in the day (most of the others under $150 aren't) and it is easy on batteries. I'm going to by a few more for the rest of my long guns with rails.
Pros: easy adjustment, works great in daylight
Cons: A little long and takes up a lot of rail space, a straight (non coiled) lead for the instant on switch would be better

This review was written in the old system and had content requirements that are different than reviews written today.