Love this red dot - Holosun Paralow HS503C Circle Dot Sight

This is an awesome red dot. I love my first one so much I ordered a second one.

Solar powered, automatic mode, dot alone or circle dot. I love the circle dot. makes it very east to acquire a target quickly during competition. Has a low rise and high rise mount. Can run in the sun without a battery.

Clear, crisp 2 MOA dot. This cost is more than half of an aimpoint. If you must have the very best then get the aim point. If you want something better than a budget $100 - $150 sight, do not hesitate. This one is awesome.

The battery compartment is tedious to undo the tiny screw, but at least a screw driver is included in the package.
Long battery life plus solar power means you will not have to mess with the compartment very often.

The auto brightness mode works really well and quickly changes the brightness with changing lighting conditions. The only con here is if you are indoors looking out into bright sun the solar panel may not adjust until you actually go outside.

This does not charge the battery, but when in auto brightness mode it will save the battery life.