Sightmark boresighter - Sightmark OPMOD 1.0 Limited Edition Green Universal Magnetic Laser Boresight

I have not used it for sighting in the gun yet, but I put the battery in and had a hard time getting the green laser light to stay on steady. It would flicker on and off like it wasn't making good contact. The battery slips into the boresighter and I'm not sure if the spring isn't strong enough to make good contact or what. When my scope arrives and I put the OPMOND to work I'll update this review to report my findings.