The Thunder Beast ULTRA 7 is their highly efficient compact .30 caliber precision rifle suppressor. It is best for applications where a compact form factor is important but suppression is still required.The Thunder Beast ULTRA 7 weighs just 9.7 ounces and is rated for up to 300 RUM. They come with their Compact Brake (CB) “Thread Over Muzzle Brake” mount. With the CB mount, the suppressor mates to a conical shoulder on the brake and locks up rock solid and extremely tight.