Product info lacked detail - Guntec USA AR 9mm Cal CAR Buffer and Spring Set

I am sure this is a very nice buffer. It was well packaged and all apeared to be high quality. That being said, I prefere a dead blow 9MM buffer to reduce/eliminate bolt bounce. One of the questions regarding the product asked if this was a dead blow buffer and the answer was that this IS a dead blow, however it is not. These are solid. I had to email Guntec to find out. That being said, Optics Planet is jam up, so they sent me a shipping label to return it and all is well.