easy to carry and great terminal ballistics.
the EOTech is great, but for longevity an optic with a fiber optic and/or tritium reticle will help save space and weight on batteries. i know the iron sights will still serve you well enough but maybe look at something like this: RX01NSN Reflex - Trijicon, Inc.
decent dot without being too big and the tritium will last for a good twelve years. after that it's best as a day sight, however.