The 338 ULTRA is Thunder Beast's latest high-performance .338 caliber suppressor. It offers class leading suppression levels with extreme light weight. The 338 ULTRA will suppress a typical .338 Lapua Magnum bolt-action rifle down to approx 135-138 dB1. It also has very little or no "first round pop" (FRP) in most applications. The 338 ULTRA weighs just 16.9 ounces. The 338 ULTRA is backwards compatibe with all 338BA brakes.