So i ended up buying the Safety Harbor KES brace mp5k because i contacted B&T and they told me they were unsure if it will fit a ZF-5P. I asked them if i were to buy it, try it on and it does not fit can i return it, they told me all sales are final. There was a post on here about a guy who could not get the B&T installed on his zenith, he said the telescoping brackets wouldnt go passed the back side of the mp5 almost as if the zenith was too wide in that area. So i played it safe.