The EOTech 512 IMO is the smartest choice. Yes it's an old design but being able to use AA batteries is the smart way of going about it. Shtf scenarios who doesn't have AA's lying around the house? CR123's will be a lot harder to find in those circumstances. I loved my 512 but ditched it when I sold my AR and bought my AK and went with an Aimpoint instead.
GOFFA Council Member
Gun Owners For a Free America
"Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life and who are willing to consciously work and sacrifice for that freedom."
~John F. Kennedy