Features Carlson’s Exclusive TST (Triple Shot Technology) which results in reduced pellet deformation, shortened shot strings and less flyers. The Rooster XR choke tube is manufactured from 17-4 stainless steel and has been specifically designed to produce the tight patterns when shooting Winchester’s New Rooster XR ammunition.  Featuring Shot-Lok Technology that produces the tight patterns and effective down range energy. These chokes come in either Early Season (LM) or Late Season (IM) constrictions to accommodate nearly all hunting situations.  Rooster XR chokes have been designed to handle lead, steel, or Hevi-Shot so they can be used for either upland game or waterfowl hunting with great results.