There's some things that need be known before ordering... - Sightmark ReadyFire G6 IR6 Infrared Laser Sight

I ordered this item once and returned because I suspected it was defective. Optics Planet's "Gear Experts" didn't know this bit of info and Sightmark's customer service didn't either which is why I initially returned the designator. After doing more digging, I found what -I- thought was a defect was actually intentional: IR lasers are SUPPOSED to switch off every 9-10 seconds due to the beam being invisible to the unaided eye. With that said, I have mounted the replacement and am quite pleased with how this designator performs.