"Ok, so I just got it, and this is my take on it so far. I put this on my JG M16A3. It goes on the top of the middle of the gun, where the carrying handle is/was(most m16's and m4's have removable carrying handles or are clear) . Its all metal, sturdy, and easily fills the role of looking over a stationary front sight. Out of the box it's just the riser, and nothing else, no instructions or anything. I managed to figure it out fairly quickly, but it's a but tricky to put on and take off."