The speed bead mounts are as low as it gets. Rib mounts are lower than receiver mounts, but a rear iron/notch sight sits lower to the rib. The receiver is the highest point on a shotgun. Anything taller than the receiver means your eye comes up higher than the rib, no matter what.

I had a battery die on a RD and cost me a bird because I couldn’t get it off and couldn’t see the sights or rib with it mounted. That’ll never happen again. I was always having to clean leaves, dew, mud off of it, too. I’ve yet to miss a bird with a bead or open sights. A scope is better than a RD: at least you have a reticle that works all the time, and you can use the magnification for something.

I may mount a peep to my TC single shot…..best of both worlds most likely.