Works with ar uppers - used with .223, 5.56, and 9mm uppers - Obsidian Arms AR-15 Upper Receiver Vice Block

I originally got an upper vice block, the one that is two pieces and goes over and covers the upper. It seems to only work with the standard uppers. I got this instead because I have some slick side uppers and 9mm uppers that are different from the standard AR upper design and this still works perfectly. The middle part goes inside of the upper and you just use the included pins that go into the pivot and take down points. So easy and happy I got it. Can confidentially recommend to anyone.