I got the Exotic Khvostov covered. Its got the 3 firing modes, Hammer forged, Rifled barrel, Braced frame and Two scopes. Also Extended mag, Counterbalance or Rangefinder. Can be found by finding Khvostov weapon parts in patrol or Arena to begin quest or breaking down OG Khvostov. My video above covers that all better then text somewhat. Thanks and enjoy I cant wait for RoI.