Reggie, only if you want the Sights to co-witness Sir. I prefer the lower 1/3rd co-witness for a more open sight view (faster target acquisition).

Reggie, You do not need high suppressor ready sights. Get the firearm. Get an optic of your choice. Figure it out from there. If you like the set up fine. If you think you want high sights after using optic for a while get them. Do not need them.

Not if you are just going to use the optics If you are just using it at the range I would not bother just carry spare batteries. for a defense gun I would want the taller sights for a co-witness