Speed bead mount for 870 - Burris SpeedBead Mounts

I have not used yet in the field so I will update after I do, but I hade play in the mount when I took it out of packaging. I know your going say won't matter it's on a shotgun , well I want well built after 33 years in the military I don't want equipment failure in any shape or form. I mounted to shotgun with little to no problems, good fit, my only concern is will it last under heavy use? That is where using it and testing in the field comes in, overall I will give it a 4 star rating as of now. More to come.