Diamandback DBX pistol in 5.7X28. This one takes FN Five-Seven magazine but they also said a version using the new Ruger 57 will be coming, unlike the CMMG one that is using an adaptor to AR mag. Spotting a 8" barrel, some sort of piston/push rod gas system, and a detachable stock/brace using the Sig MCX style rail attachment at the rear of the lower receiver. Very soft shooting and almost no recoil, and you are getting the ballistic of a 223 at the 300m line .