The ULTRA 9 is Thunder Beast's full-size precision rifle suppressor. It is best for applications where maximum suppression is key. The ULTRA 9 is available in .30 caliber and 6.5 mm caliber. The .30 caliber version is best for maximum flexibility for .223 up to .300 RUM. The 6.5 mm caliber version optimizes suppression performance on 6.5 mm and smaller calibers. The ULTRA 9 will suppress a typical .308 bolt-action rifle down to approx 132-134 dB1. The ULTRA 9 will suppress a typical .300 Blackout bolt-action rifle to about 118-120 dB shooting subsonic ammunition. It also has very little or no "first round pop" (FRP) in most applications. When shot on a .260 Remington or 6.5 Creedmoor, the 6.5 mm Ultra is 2-3 dB quieter than the .30 caliber Ultra on the same rifle.