Bison Tactical now carries the Thunderbeast 338 Ultra for sale in both Compact Brake version or Direct Thread. The Thunderbeast 338 Ultra CB model comes with one brake. Please include a comment with your order to specify the thread pitch based on the list below. Thunder Beast Arms Corporation leads the way in designing high precision 338 Lapua Suppressors. Quiet without sacrificing accuracy is what you get from the Thunderbeast 338 suppressor.