Have an 870 SM that I just bought a FFIII for. I have been researching mounts for the 870. Question to you guys is who has used the B-Square, UTG or TMS mounts and looking for opinions/experiences with either. They all look about the same except the UTG has many cuts out of it, making it lighter I suppose and the UTG and TMS are about $20-25 cheaper. Or is there another one out there that I have not found? Any information/opinions would be appreciated.