Rolling Thunder CORE Brute LA Cutdown Duck Call, Acrylic, Frost The Rolling Thunder CORE Brute LA is a cutdown duck call made in acrylic with a Frost color treatment. The named call design and material are the key distinctions of this version. The cutdown designation describes the call format. This is a dedicated duck call for waterfowl calling, with the CORE Brute LA name distinguishing its specific design. The Frost treatment provides the visual identity of this acrylic version. Key Features Call design: Cutdown configuration. Acrylic construction: Acrylic call body. Color: Frost variant. Specifications Brand: Rolling Thunder Model: CORE Brute LA Type: Cutdown duck call Material: Acrylic Color: Frost Shop the Rolling Thunder CORE Brute LA Cutdown Duck Call, Acrylic, Frost at BattleHawk Armory.