A great product that is made from metal so you know it will last.
Everyone seems to be upset that you need allen keys to tighten it onto the stock rail. I figured allen keys were a common household tool but I could be wrong. By the way, the allen key you need is a metric one.
Allows you to aim with a mask on which is needed if you have a stock
A great site rail!! A must buy if you want a reliable product!