Well I got one of the Primary Arms MRDS green 5 moa dot for the Mossberg 930. Took it out Monday to zero it. First 2 shots were touching 2inchs low and dead center at 25 yrds. 3rd shot was low,4th shot way low and watched the dot jump to the top of the glass 5th shot jumped higher.
Prior to shooting checked all the locking screws all were snug.
Took it back to the rig and got in to my new range box my Lovely Fiance got me for Christmas, and started to adjust the dot. I bottomed out the down with no luck on getting the dot down.
Disappointed removed the sight and finished running the gun for another hour worked like a charm.
Got home and called Primary Arms the guys there were outstanding after telling them what happened one of the guys suggested the Mini red dot with fixed base and stated they would send it out Tuesday with a return label. They really stand behind what they sell. Which surprised the Heck out of me no questions asked and were really knowledgeable. So if anybody is considering a sight or scope check out Primary Arms and thanks Oli for recommending them.
I'll update when I get the sight in a couple of days.