Great optic compared to others with the doctor footprint - Viridian Weapon Technologies RFX-25 1x20mm Micro Green Dot Sight

I bought this because it was one of the only optics that fits the useless plate that the Springfield Prodigy ships with. That said, the optic is holds zero with no problem. It's probably not the strongest optic, I will not be doing any drop tests or even carrying it but, if you're looking for a solid rot for a range gun or perhaps an offset on a low buget rifle build, this could be for you. The "shake awake" feature is not instant, it actually takes about 2-3 seconds. You can see this for yourself just by not touching the gun for two minutes so it auto shuts off. Now look through the glass move the dot or gun a bit to watch the "shake awake" roll out of bed like a teenager waking up for school. The glass is clear, the dot is crisp and clear and it holds zero. I would only recommend for light use and when you can get it on sale w/ added coupon codes to get it as cheap as possible.