Wheeler vice block - Wheeler Engineering Delta AR Upper/Pic Rail Vise Block

This is a five-star tool. I gave it four stars due to the fact that nowhere in the sales literature or on their website did I see where they mentioned the need for a six inch vise. The pictures do show it in a 6 inch vise, sure it's a vise block so you expect to it to be shown in a vise. Once you read the instructions you realize that the upper should not move in the vice block. I have a heavy duty 4 inch vise and no matter how hard I cranked the vise the upper still moved. I then realized why they specify a six inch vise! I wasn't about to go buy a 6 inch vise so I cut two pieces 8 inch long of 1-1/2" angle iron. I cut them longer in case I needed to "c" clap the ends which was not necessary. Using the angle iron in the vise I was able to clamp the vise block along it's length and the upper didn't move. I used it for a billet and a forged upper worked great on both. It's a great tool if used the way it's meant to be used and you read the instructions!