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Thunder Beast Releases New 338 Ultra SR Silencer

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Thunder Beast Arms Corporation's new 338 ULTRA SR suppressor is the company's first suppressor to feature its new SR mount. The company says the SR, or secondary retention, mount has been in the works for four years and was selected by Accuracy International for its 2017 US SOCOM Advanced Sniper Rifle (ASR) contract submission.

The SR mount is a quick detach mount that maintains the accuracy and repeatability standards TBAC is known forand adds a rotation, locking collar that provides secondary retention for the can. The SR mount acts as a secondary, fail-safe, locking mechanism that locks the suppressor to the muzzle brake. The mount's course threading reduces the number of turns required to mount the suppressor.

From Thunder Beast:

The SR mount uses a novel paw and cam-path system to ensure that happens in either of the two adjacent detent slots for any shouldering position of the suppressor on the conical brake shoulder. This eliminates the off-by-one problem that many ratcheting mounts have. The SR mount has the exact same accuracy, repeatability, and return-to-zero characteristics that all our precision suppressors are known for.

The ULTRA series is constructed of titanium with a fully-welded core. This material and construction provide a great strength to weight ratio. It can take whatever your precision rifle can dish out. The 338 ULTRA SR was designed around .338 Lapua Magnum for maximum flexibility and is rated with that cartridge down to 16-inch barrels. The 338 ULTRA SR can easily do multiple-rifle duty on 6mm's, 6.5's, .260's, .308, and most .30 caliber magnums.


  • Ionbond DLC coating on 338SR brakes
  • Conical shoulder surface on mount
  • 100% titanium construction of suppressor body
  • 360-degree fully-welded baffle core
  • Magnum rated
  • Rock-Solid POI Repeatability
  • Patented SR brake with full lockup in at least two positions
  • Full 2017 ASR solicitation submission spec


Caliber .338 caliber, up to .338 Lapua Magnum or .338 RUM
Material Titanium
Length 11.0 inches.
Diameter 1.775 inches (suppressor body); 1.855 inches (rear collar)
Weight 20.2 ounces
Mount 338 ULTRA SR brake
Brake Threads 5/8-24, 3/4-20, 3/4-24, 3/4-28, M18x1.0, M18x1.5
Finish High-Temp CeraKote: Black, OD Green, FDE, Federal “20150” (ie, SURG Brown)
Use Precision/Long-range on big-bore magnums that require military-spec retention
Price $2195 (one brake included).
Warranty  Limited Lifetime Warranty

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