Good laser(?). - Firefield Green Compact Pistol Laser Sight

I think this is a good laser but unfortunately the one I got did not work. Not sure if it was the batteries or the device. Had it worked I would have sent it back as it as longer than what I wanted. I have a S&W M&P 9 Pro, and the laser extended past the barrel. I ordered a TruGlo Micro-Tac laser and I am totally happy with that one! I would consider buying (a working version) this again for different platform.