Things I liked:Perfect for the Evanix bullpup I got. No holes to drill or alter. Straight drop in to the picatinny rails. I got four of these for my Evanix bullpup. It works perfectly and easily detached if not needed. Things I would have changed:Swivel mount would be nice and a smaller rounded ring instead of rectangular ones would be better to hook up your sling. What others should know:Because the sling mount is rectangular, when you connect your sling on it, it plays so much from side to side. As it slides back and forth, your sling will scratch the sides of your expressive and beautiful Evanix. So be extra careful swinging it around while your gun is dangling from your neck and shoulder.