One of the best - Viridian Taurus PT24/7 (Not Millenium) Green Laser

I procured this product with great expectations and was not dissappointed. The resulting combination of gun and laser is unmatched anywhere. I have red laser sights and this is vastly superior.

The only problem I had was knowing enough to lock the latch that holds the product to the gun. I discovered at the range that the recoil will dislodge the sight unless it is properly locked in place. The documentation is not that clear in this area and I missed it.
Pros: great visibility, well designed
Cons: lack luster documentation

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