I saw these stocks at the Shot Show,and was impressed.In fact,they were one of the few things at the show that impressed me.I liked the way it's designed to move under recoil.The way the chassis is constructed,the muzzle actually travels downward to counter recoil.The rep told me they had been tested with one of Remington's prototype 338 Lapua's, and they claimed it has been tested extensively.As far as Knoxx's reliability,I haven't seen anything negative about them,but you know how much you can really trust most magazine reviews.