The mount for the Rem 870 is not the plate shown in the photo - it's a flimsy ring that is extremely difficult to mount well. The foam pad that helps hold the mount to the top of the receiver also gets pinched and ruined if you don't mount it perfect the first time. Probably because of all this, I find the dot shifts after firing. The mount could be FAR better. I'm not done trying to improve it and get it to work, but so far, buyer beware.
Pros: Clear screen, keeps field of view open
Cons: terrible mount, dot shifts when firing
This review was written in the old system and had content requirements that are different than reviews written today.