I bought this handguard set and it is very solid, The pistol grip is just a little longer with very nice ergo's , and I find it's a better fit than my fab Defense.
The Set through a little research is Czech Mil issue? correct me if I'm wrong. A gent of another forum said it was CZ arsenal?
Super tough polymer, and it's thicker than than the the stock set. Also it's a pressure fit system for the lower.
Very happy with the product.