It honestly took me some fumbling around to figure out the battery situation so I can see how that would happen. I ALMOST looked at the directions, but luckily I got it open before having to shame myself by reading. the dot is easily visible in the light. No problem even splashing against a white wall. That docter is a nice little optic.
I looked at the X300 but its a little bit longer and the mount doesnt line up with the pistol rail. Gives it a "step". Was also looking at that AA powered insight light but I couldnt find any pics on a walther and didnt want to risk crappy fitment. Im pretty happy with form/function here. Put 200 more through it after work last week to test the new frame and still flawless. Will try to sneak another session in next week with the light attached.