winmag; any particular eotech model? there's several as I recall.
You want one with a model number ending in "AA", which uses AA batteries, rather than "N"s. There's a 510 and 550 AA, with minor differences between them. You can get either a thumbscrew mount, or throw levers. Keep an eye out for sales from various internet sources.
A holographic sight provides the widest viewing angle, and Eotech makes the only models used by the US military. All the other brands are cheapie consumer models.