Rfx25 uses the doctor footprint and can be directly mounted on your weapon. The qd mount is excellent, i really like qd and this one is one of the best i've used so far.

Viridian rfx series of slide mounted * optics is great. Comes with a 7 year warranty from viridian, which is pretty amazing. Optic has brightness settings on either side, one button for up and one button on the other side for down.

It works as advertised. Love the shake to wake and only took minutes to zero in at 10 yards. Shake awake seems good.

The rfx series is a good edc option. Has nv compatible mode. Far exceeds my other dots red dot sites, from burris and vortex.

Tried the used battery again, nothing. Even on the maximum brightness and with a new battery, it's just not enough. Did not hold zero either.

They aren't as bright as the other brands. They shoot way low bottom line.