Lasermax centerfire laser on my s&w shield - LaserMax CenterFire Laser Sight for S&W Shield

The bottom of the trigger guard had a slightly irregularity right where my middle finger rested against it. The two halves of the mold didn't match perfectly. It took less than five minutes to file this smooth. That was the only problem found during installation.

A couple of twists with the allen key brought the laser dot into agreement with the sights, at the range available inside the house. I still need to actually zero it, but don't think there will be any problem with that. The adjustment is very smooth, not jerky as I've experienced with other plastic devices which have screw type adjustment.

MY stubby trigger finger has no problem reaching the On/Off switch

I can't assign a 5 star rating until I see how durable the device proves to be and how well it retains it's zero under actual use.