Thunder Beast: Dominus-SR Suppressor

Thunder Beast
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The Dominus-SR is Thunder Beast's high performance hard use full auto rated 30 caliber suppressor. It is constructed from high quality titanium making it a very lightweight option when compared to most other suppressors. This suppressor offers unmatched accuracy and retention. If you have used ultra suppressors, the Dominus meters right in between an Ultra 7 and 9. The 6.95-inch DOMINUS-SR meters at 137 dB (milspec left/right) and 126 dB at shooters-ear on a 20-inch .308. These numbers are from a PULSE system. The SR quick detach mount offers a rugged retention system that will always stay locked in place and lockup the same after being taken off and put back on. There is no noticeable shift after taking the suppressor off. This suppressor is compatible with only the SR brake in either .30 cal or .338. The SR mount uses a novel paw and cam-path system to ensure that "full lock up" can happen in either of the two adjacent detent slots for any given final shouldering position of the suppressor on the conical brake shoulder. This categorically avoids the "off by one" problem that many "clicky" mounts have. The SR mount has the exact same accuracy, repeatability, and return-to-zero characteristics that all TBAC precision suppressors are known for.


  • Max caliber: .30 caliber, up to .300 RUM

  • Material: Titanium

  • Length: 6.95 inches

  • Diameter: 1.85-inch OD (collar), 1.80-inch OD

  • Mounts: SR series brake (full spec)

  • Weight: 12.5 ounces

  • Brake TPI's: 1/2-28, 5/8-24, 9/16-24, 3/4-24, 3/4-28, M18x1.0, M18x1.5

  • Finish: Black CeraKote; OD Green or FDE available

  • Brake Material Heat-treated 17-4 stainless

  • Brake Finish: Ionbond DLC

  • Use: Hard-Use/Full-Auto & Precision/Long-range



There is general confusion as to what firing schedules different suppressors on the market can actually withstand. There are "full auto"-rated suppressors that will fall apart after a few mags of full auto, and on the other hand, there are some "precision rifle suppressors" that will actually withstand a lot of abuse. 


Lifetime to exceed at least 10 SURGE cycles on a 10.5" M4 / MK18.

One SOCOM/SURGE CYCLE comprises:

  • Mag 1: 1 round/second 
  • Mag 2: 2 rounds/second 
  • Mag 3: 1 round/second 
  • Mag 4: 3-5 round burst 
  • Mag 5: 1 round/second 
  • Mag 6: 2 rounds/second 
  • Mag 7: 1 round/second 
  • Mag 8: 1 continuous burst 

Outlined in Section 3.6.1.i. in Solicitation H92222-17-R-0011 

The basis for this is the SOCOM/SURGE specification, which is a common heavy firing schedule specified in many military solicitations. One SURGE cycle is 8 magazines fired in this pattern, with magazine changes happening as quickly as possible. After a full 8-magazine cycle, the suppressor and firearm is allowed to cool to ambient. This firing schedule significantly exceeds the worst-case application of assault rifles and baffle rifles. A milspec M4 needs service and inspection after each cycle to keep operating.

Most common 17-4 steel muzzle brakes will be eroded significantly or have critical surfaces destroyed after 2-4 SURGE cycles. How often has your firing schedule destroyed your muzzle brake? If the answer is never, you haven't even exceeded half of what this suppressor can take.

Suppressors in this category will still have minimum barrel length ratings for most cartridges.

The SR muzzle brake will have a replacement schedule if fired "to the letter" of this schedule. It is recommended that the SR brake be replaced when visible deformation of the brake ports happens, or the suppressor simply won't fit over the brake anymore.


Minimum barrel lengths: 

5.5" .300 Blackout (subsonic and full power)
7.5" 6.8 SPC, 7.62x39
10.3" 223 Rem, 5.56, 6.5 Grendel
12.5" .308 Win, .260 Rem, 6.5 Creedmoor
18" 6.5 SAUM, 6.5 PRC, 7mm RM, 7mm WSM, .300 WIN MAG, .300 WSM
20" 7mm RUM, .300 RUM
22" .300 Norma Magnum, 28 Nosler, 7 STW, 26 Nosler


Once your suppressor purchase is finalized with Mile High Shooting, a Form 3 will be filed with the ATF requesting approval to transfer your suppressor to your chosen FFL. Initial processing can take 3-7 business days. Customers may help expedite this time frame by requesting the chosen FFL to send a copy of their FFL & SOT to Please note, initial processing time may be delayed further if your chosen FFL fails to provide required documentation in a timely manner. Once submitted, it takes 7-21 days for Mile High Shooting to receive the Form 3 approval. As soon as the approval is received, your suppressor and any accessories will be shipped to your chosen FFL within 24-48 business hours by 2 Day Air. Your chosen FFL will then contact you once it is received and you may complete your Form 4 processing at their facility. 

___LEGAL INFO______

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 DO NOT ALLOW private ownership of suppressors: CA, MA, DE, HI, NJ, NY, RI, IL, District of Columbia. CA allows class 3 dealers and class two manufacturers to possess suppressors.




  U.S. Government Export Restriction

This item is restricted for export by the State Department and Department of Commerce. Make sure that you are familiar with all applicable laws.  ITAR Information.


FFL Requirements & Magazine Restrictions

This item has to ship to an FFL. Please read the attached information. Shipping Rules & Magazine Restrictions.