I bought this as an accessory when I bought MAG. It DOES NOT WORK WITH MAG. Although to be fair it is not the attachment's fault really. When you play MAG (and possibly other shooters.) For the sole reason that you would need 3 hands to make the configuration work. Why?
1/ Gun in hand, finger on trigger.
2/ Other hand, co-controller for walking, crouch, etc.
3/ 3rd hand for pushing the buttons on the top of the Move controller (in the oval window in the top of the gun)to reload, action, and communicate.
Therefore, unless you have a 3rd hand, I'd give this item a pass.
We will have to see once Killzone3 comes out. Maybe the button configuration is different, and it might actually be something I can actually use.