Thunder Beast: 338 Ultra Suppressor - Gen 2

Thunder Beast : 338 Ultra GEN2
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The Gen2 338 Ultra is the quietest .338 caliber suppressor on the market today for everything up to .338 Lapua Magnum. It's quieter than the Gen1 by about 3db, and .2 ounces lighter. It offers class leading suppression levels with extreme light weight. The Gen2 338 Ultra has the original TBAC large Brake Attach (BA) brake attachment, the same mount as the original 338 Ultra, and older 30BA series. This design is backwards compatible with all 338BA and 30BA brakes. It can also be used on the smaller CB brake mounts with the addition of a CB2BA adapter. 



  • Caliber: .338 caliber, up to .338 Lapua Magnum or .338 RUM
  • Material: Titanium
  • Length: 10.4 inches.
  • Diameter: 1.8 inches
  • Weight: 17.2 ounces
  • Mount: 338 BA brake (included)
  • Finish: High-Temp CeraKote: Black 
  • Use: Precision/Long-range on big-bore magnums, Hard use/Full-auto


Minimum Rated Barrel Lengths

  • 5.5" .300 Blackout (Full power and Subs), 6.8 SPC, 7.62x39,
  • 8" .308, 6.5 Creedmoor, .260 Rem, 6 Creedmoor, .243 Win, .22 Creedmoor, .223/556 (SEMI AUTO)
  • 10.3" .223/556 (FULL AUTO per Dominus-SR schedule)
  • 12" 26 Nosler, 6.5 SAUM, 6.5 PRC, 7 WSM, 7 SAUM, 7 STW, 7 RM, 300 WSM
  • 14.5" 300 PRC, 300 RUM, 7 RUM, 300 WM, 300 WBY, 6.5-300 WBY
  • 16" 300 NORMA, 28 Nosler, 338 LAPUA, 338 NORMA









Mile High Shooting Accessories (MHSA) will only ship suppressors to Class III FFL holders. BATF regulation information for Suppressor ownership are as follows:

Be at least 21 years of age.
Be a U.S. citizen. 
Have no felony convictions or domestic violence convictions. 
Have no dishonorable discharge. 
Not deemed mentally unstable by a competent authority. 

The NFA rules/laws are posted through the BATF website. At this time, the following states ALLOW private ownership of suppressors: AL, AK, AR, AZ, CO, CT, FL, GA, IA, ID, IN, KS, KY, LA, ME, MD, MI, MN, MO, MS, MT, NC, NE, ND, NV, NH, NM, OH, OK, OR, PA, SC, SD, TN, TX, UT, VA, VT, WA, WV, WI, and WY. CA allows class 3 dealers and class two manufacturers to possess suppressors.