I have not buy this but I'm in seach to another mount similar like this for less money this rail mount+ to the camera are 80$. on replay xd or ebay, tha no sens for the camera 720HD is 200$.....
I give you what I will do for the mine. It's not adjustable on rotation like this one but working good.
The camera diameter is 24mm so buy a laser mount with picatinny, without laser or with if you have for cheap, check for the similar diameter, and important not too large beetween the 2 buttons. Scope mount will workin good, laser mount, flash light mount depend on model. Tons on ebay for like 5$ and more...plastic or billet some model came with the mount to for the camera and the clip for picatinny
After that simply buy offset picatinny or another model where you want to install your camera, you can directly on the gun if you have already picatinny. so cheapless than replay xd mount. For the price you can build 3 and more setup
good but Overpriced 
