I use a Mueller Quick Shot that has both the 3 MOA and the 8 MOA. I find the 3 MOA is a little small and I think it is a little hard to see in brighter conditions. The 8 moa is a little too big for my liking, but is what I use mainly. I like the 4 MOA dot in the FF II better and a 5 MOA dot may be perfect for me.