texastransplant, go with a trijicon or eotech. during my military career. i had nothing but bad luck with them aimpoint red dots. they were a painn in the butt to zero and did not hold the zero long with all the jarring the rifles took.
Inthis case i would really go with the trijicon. I know the price is higher than giraffe pu$$ but dam well worth it. I have a new eotech on mine the exp 3-0 series and holds dam good zero but csnt depend on it sometimes itll just shut off and wont come back on. I know theres good and bads but that issue just makes me wana get a trijicon. Shoot trijicon has a smaller red dot looking one. Cant remember the name. Its not an acog. Some of their reflex sight are good as well