I like this product but I did have it fail to work after some quick fire drills on my 870 Rem. It worked again after switcing the switch off and on a few times . It was deadly with 2&3/4"Slugs @ 10 yards point of aim from the hip , bulls eye every time in daylight. You can count on this if you need to use deadly force up to 10 yards as tested. Note:You will lose one round in the magazine due to its size ,3 in stead of 4. Tested with both 2&3/4,00 buck and slugs .

Looks good functions well. However it will only thread 2 turns instead of the required 4 turns on a Mossberg 500. The thread depth is just to short for a proper seat to be secure and weather tight. If it threaded on I would be very pleased with the unit

The Laser works good. The only thing I found is that it says it doen't change magazine capacity. I have two Remington 870's, ones a Mag, and ones a express. I bought one for each of them. Both held 4 in the magazine tub. With the Laser on, they only hold 3.

This is a good product but will not fit mossberg 500 or 590. I mounted it in front of the mag tube with a tube extension bracket on my 500. It works good like that but not as listed. If I ordered it for a remington I would give it five bullets.

This laser fit perfectly on my Remington 870. It is well worth the money. It paid for itself the first time I used it.

This item looks great and the laser is bright, but it does not work on a Mossberg 500 sport. It's also about 3in. long 2in. of it is in the tube losing a round.

This is a great laser and I'm sure it works perfectly for the Remington 870's but it does not work on the Mossberg 500 or at least the Mavrick 88, which I read is the same shotgun, just without the added safety precautions. I am thinking about getting some sort of adapter for it or rig some rifle scope mounts on the barrel, thats how impressed I am with the product.