Seems to clip on to the rail, seems to be solid but the wiggle test makes me a bit unsure it would stay in the zero impact area as I could move it with just a little tapping on the end. So I'm calling this one a wash, might be good for getting a bore line on paper maybe, still keeping it around for further testing maybe to see how good it is close in, what was the reason I got it for any ways. Laser seems decent.
Just where is a good place to mount lasers anyways? This was a gamble that didn't pay off much this time. Probably good for a hand gun for close range.