I just put one on an 870 earlier this year for night hunting. Had to do a few mods to the base to get correct alignment and cheek weld, but overall it seems like a quality piece. I used a fastfire III in a speedbead mount BTW. It sure is nice to just throw it up, place the bead, and pull the trigger. I would definitely go with a fastfire III with the correct mount, rather than the actual speedbead I.e fastfire II. The fastfire III has major improvements over the older models. I would not recommend one for wing shooting, only predators.