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Thunder Beast Suppressor Buying Guide

Every current Thunder Beast Arms (TBAC) suppressor we carry, family by family: what each one is for, what the CB, SR, BA and HUB mounts mean, which accessories they take, and what independent testers found.

How to Choose a Thunder Beast Suppressor

Thunder Beast Arms Corporation (TBAC) builds titanium precision rifle suppressors in Cheyenne, Wyoming, and it's a favorite in precision rifle competition. PrecisionRifleBlog's survey of the top 200 Precision Rifle Series shooters found 40% running a TBAC suppressor. Most TBAC rifle cans are 100% titanium with a tubeless, 360-degree fully welded baffle stack, which is how they stay so light.

Pick the family first, then the mount:

• Ultra series (Ultra 5, 7 and 9) is the lightweight 1.5 in. line for bolt guns and semi-autos, in .30 cal or 6.5mm.
• Magnus series (Magnus, Magnus S and Magnus K) is the larger 1.8 in. line for more suppression and magnums up to .300 Norma Mag. Each length also comes in an RR (Reduced Recoil) version with a brake on the front.
• 338 Ultra is built for .338 Lapua Magnum, with an RR version too.
• Spiro is the low back pressure, hard-use suppressor for 5.56 and 6mm gas guns.
• Fly 9 and Fly 45 are modular titanium pistol suppressors, and the 22 Take Down is the rimfire can.
• Mount letters in the model name tell you how it attaches: CB, SR, BA or HUB.

If you're shopping for a Dominus, TBAC retired it when the Spiro came out. The Magnus S and Magnus K replace the Dominus and Dominus K for rifles, and the Spiro replaces it on 5.56 gas guns.

Which Thunder Beast Suppressor Should You Buy?

Thunder Beast Mount Systems: CB, SR, BA, HUB and Direct Thread

The letters in a TBAC model name tell you how it mounts, and the mount decides which muzzle devices fit and whether the suppressor is full-auto rated. All TBAC taper mounts lock onto a conical shoulder on the brake, which is where their accuracy and return to zero come from.

CB (Compact Brake)

CB is TBAC's standard precision mount. The suppressor threads over a CB Muzzle Brake or CB Flash Hider and seats on its conical shoulder. It's shared by the Ultra 5, 7 and 9 and the CB versions of every Magnus length, so one set of CB brakes covers all of them. CB is not full-auto rated.

TBAC now makes CB brakes in two styles. The classic timed brake is indexed with a Peel Washer. The non-timed brake (NTB) is shorter, has ports all the way around, and needs no peel washer or timing, but it brakes less when you shoot without the suppressor. Add an External Thread Protector to cover the brake threads when the suppressor is off.

SR (Secondary Retention)

SR adds a locking collar that holds the suppressor on the brake until you release it by hand. The coarser thread takes fewer turns to mount, and the lock-up works in either of two adjacent detents, so it doesn't have the off-by-one problem some clicking mounts have. It met the mount requirement in the 2017 Advanced Sniper Rifle solicitation. SR is the only TBAC rifle mount that's full-auto rated: SR suppressors are rated to last at least 10 SURG cycles on a 10.5 in. M4 or MK18.

SR adds about 0.7 in. and 2.9 oz over the CB version of the same Magnus. The newer SR v2 brake is about half an inch shorter. Existing SR suppressors (Magnus and 338 Ultra) fit SR v2 brakes, but the Spiro SR only fits SR v2. Our SR Muzzle Brake fits the Magnus SR and 338 Ultra SR.

BA (Brake Attach)

BA is TBAC's original, larger brake mount, used on the 338 Ultra. It fits the 338BA Muzzle Brake and the 30BA Muzzle Brake. If your rifles already wear CB brakes, the CB-TO-BA Adapter semi-permanently converts a BA suppressor to mount on CB devices instead.

HUB

The HUB versions of the Magnus, Spiro and Fly 45 use the standard 1.375x24 thread, so they take mounts from other brands. They ship with no mount. HUB is meant for experienced users: you're responsible for the mount you choose and for keeping it tight, especially on heavy firing schedules. Popular HUB mounts we carry:

• SilencerCo Bravo ASR Mount and SilencerCo Bravo Direct Thread Mount
• Dead Air Key-Mo Adapter and Dead Air Xeno Adapter
• Q Plan-B, Rugged Universal Mount (RUM) and YHM Phantom QD Mount
• The Energetic Armament Thunder Beast HUB Mount, which lets a HUB suppressor lock onto your existing TBAC CB brakes and flash hiders

TBAC dropped the HUB versions of the Ultra 5, 7 and 9 in 2024. If you want TBAC on a HUB mount, the Magnus K, Magnus S and Magnus HUB are the replacements.

Direct thread

The Spiro comes in direct thread (1/2x28 for 5.56, 5/8x24 for 6mm) with a Nord-Lock washer to keep it tight on a dedicated gas gun. The Ultra 5, 7 and 9 also come in direct thread with a 5/8x24 mount, the simpler option for a single dedicated rifle. The direct thread version weighs 1.8 oz more than the CB version, and TBAC can convert an Ultra between CB and direct thread through factory service. The 22 Take Down threads onto standard 1/2x28 rimfire threads.

Pistol mounts (Fly 9 and Fly 45)

Both Fly suppressors ship with a piston and booster and work with standard Rugged, Griffin, SilencerCo and TBAC pistons, including our SilencerCo Piston and Rugged Piston. The Fly 9's rear is threaded 1.125x28, so it takes SilencerCo Alpha-pattern mounts like the SilencerCo Alpha Direct Thread Mount and SilencerCo 3-Lug Mount. Remove the Fly 45's booster and booster basket and you have a standard HUB rear; with the basket installed it also accepts 1.125x28 mounts. For tri-lug, use a self-contained style mount. Some newer SIG pistols need a non-standard, muzzle-indexed piston, so check the Fly manual before you order a piston.

Thunder Beast Ultra Suppressors: Ultra 5, Ultra 7 and Ultra 9

The Ultra Gen2 series replaced the originals in November 2020. Compared to Gen1, the Gen2 cans are on average about 2 dB quieter and 20% lighter with the same strength and caliber ratings, and you can spot them by serial numbers above C40000. All three are 1.5 in. in diameter, 100% titanium, tubeless and fully welded, and each comes in two bores:

• .30 cal, rated from .223 up to .300 RUM, for the most flexibility.
• 6.5mm, rated up to 6.5mm (.264), which suppresses a little better on 6.5mm and smaller cartridges.

Minimum barrel lengths are the same for all three: 11.5 in. for 5.56 and 6 ARC, 14.5 in. for .308 and 6.5 Creedmoor, 16 in. for 6.5 PRC and 7mm Rem Mag, 18 in. for .300 Win Mag and 22 in. for .300 RUM, .300 PRC and .300 Norma. Each Ultra comes on a CB mount or in direct thread (5/8x24); CB lets you run a brake or flash hider when the suppressor is off, and direct thread is the simpler setup for one dedicated rifle. Keep an Ultra under 800 degrees: one fast magazine from an AR-10 or AR-15 stays under that, but a second one may not. Shop all .30 cal and 6.5mm suppressors.

Thunder Beast Magnus Suppressors: Magnus, Magnus S and Magnus K

The Magnus family uses a larger 1.8 in. titanium body for more suppression than the Ultras. It's rated for .30 cal cartridges up to .300 Norma Magnum and comes in three lengths and three mounts: CB, SR (full-auto rated) and HUB. Weigh a Magnus every 500 rounds and cleaning it if it has picked up more than 1 oz of carbon.

Every Magnus length also comes in an RR (Reduced Recoil, sometimes called Race Ready) version. The RR replaces the flat end cap with a brake on the front of the suppressor. On .300 Win Mag, every RR model cuts recoil by over 60% compared with a bare muzzle; a standard Magnus with a flat cap cuts it by 29%. RR adds 1.5 in. and about 2.4 oz. The tradeoff is sound: the Magnus K-RR is about 10 dBA louder at the shooter's ear than the standard Magnus K.

Minimum barrel lengths for every .30 cal Magnus: 5.5 in. for 300 BLK and 7.62x39, 8 in. for .308, 6.5 Creedmoor and 5.56 (semi-auto), 10.3 in. for 5.56 full-auto on SR, 12 in. for 6.5 PRC and 7mm Rem Mag, 14.5 in. for .300 Win Mag, .300 PRC and .300 RUM, and 16 in. for .300 Norma Mag.

Ultra or Magnus?

Same mount system, different priorities. The Ultras are 1.5 in. and lighter; the Magnus line is 1.8 in. and quieter at each length, and it's the only one of the two with SR (full-auto) and HUB versions. For a light hunting rifle or a PRS gun where weight counts, go Ultra. For magnums, SBRs that see heavy use, or when you want the quietest TBAC can at a given length, go Magnus.

Thunder Beast 338 Ultra Suppressor

Shop all .338 and large bore suppressors.

Thunder Beast Spiro Low Back Pressure Suppressor

Thunder Beast Pistol Suppressors: Fly 9 and Fly 45

Both Fly suppressors are modular, titanium, tubeless and fully welded, and both ship with a piston and booster for tilting-barrel pistols. Because they're all titanium, you can clean them chemically with CLR after removing the O-rings, booster, piston and spring. Weigh them every 500 rounds and clean them if they've gained more than 1 oz of carbon. Most pistols need a piston that matches the barrel thread, or a threaded barrel if yours isn't threaded. Shop all pistol suppressors.

Thunder Beast 22 Take Down Rimfire Suppressor

Thunder Beast Silencer Summit Sound Test Results

Thunder Beast hosts the Silencer Summit every August at its indoor test facility in Cheyenne, Wyoming. It's open to any suppressor maker, and every suppressor is tested on the same rifles, ammunition and microphones in the same week. The 2026 event had representatives from over 20 companies, including Dead Air, Sig Sauer, EOTech and Otter Creek Labs. TBAC runs the equipment, does the analysis and writes the report, so keep in mind that one of the brands being tested is also running the test. The full data, graphs and CSV files are public on TBAC's site: 2026, 2025 and 2024.

The numbers below are the Mil dBA average: the average of the two MIL-STD microphone positions (left and right), in dBA. Lower is quieter. Compare numbers only within the same rifle and ammunition, since a .300 Win Mag and a subsonic 300 BLK load produce very different readings. Each model shows its most recent Summit result.

Rifle suppressors, 2025 Silencer Summit

The .300 Win Mag host was a 26 in. Savage 110 with Federal 150 gr ammo. The subsonic 300 BLK host was a 16 in. bolt action with 220 gr Stelth subsonic ammo. The TBAC .30 cal suppressors were tested on CB mounts and the 338 Ultra on BA.

On .300 Win Mag, the Magnus RR had the lowest reading of the 61 .30 caliber suppressor setups tested. On subsonic 300 BLK, the Magnus had the lowest of the 70 .30 caliber setups. The RR brake lowers the reading on the MIL-STD microphones but raises it at the shooter's ear, where the standard Magnus read about 10 dBA lower than the Magnus RR.

Gas gun, pistol and rimfire suppressors

The Spiro was the only TBAC suppressor tested at the 2026 Summit. The Fly 9 and Fly 45 were last tested in 2024.

Thunder Beast Suppressor Comparison Table

Rifle lengths and weights are for the CB version (BA for the 338 Ultra; direct thread or HUB for the Spiro). Fly lengths and weights include the piston or booster.

Lightest rifle suppressor: Ultra 5 (6.0 oz). Quietest .30 cal: Magnus. Most recoil reduction: Magnus S-RR (65% on .300 Win Mag). Shortest centerfire: Fly 9 in its short setup (4.4 in.). Lightest overall: 22 Take Down (4.8 oz).

Thunder Beast Accessories: Brakes, Flash Hiders, Adapters and Mounts

CB mounts (Ultra series and Magnus CB)

• CB Muzzle Brake, the standard mount for every CB suppressor
• CB Flash Hider in .223 (1/2x28) and .30 cal (5/8x24, 9/16x24) for less flash when the suppressor is off
• Peel Washer for timing a classic CB or BA brake
• External Thread Protector for CB and BA muzzle devices

SR and BA mounts

• SR Muzzle Brake for the Magnus SR and 338 Ultra SR
• 338BA Muzzle Brake and 30BA Muzzle Brake for the 338 Ultra BA
• CB-TO-BA Adapter to run a BA suppressor on CB brakes

HUB mounts (Magnus HUB, Spiro HUB, Fly 45)

• Energetic Armament Thunder Beast HUB Mount to run a HUB suppressor on TBAC CB muzzle devices
• Third-party HUB mounts: SilencerCo Bravo ASR Mount, Dead Air Key-Mo Adapter, Dead Air Xeno Adapter, Q Plan-B, Rugged Universal Mount (RUM) and YHM Phantom QD Mount

Pistol mounts (Fly 9 and Fly 45)

• SilencerCo Piston and Rugged Piston in the thread that matches your barrel
• SilencerCo Alpha Direct Thread Mount and SilencerCo 3-Lug Mount for the Fly 9's 1.125x28 rear

Browse everything in muzzle devices, rifle mounts and pistons and pistol mounts.

Thunder Beast Suppressor FAQ

What is the best Thunder Beast suppressor?

It depends on the rifle. For a light hunting rifle or PRS gun, the Ultra 7. For the quietest .30 cal, the full Magnus. For less recoil on a magnum, a Magnus RR. For .338 Lapua, the 338 Ultra. For a 5.56 or 6mm gas gun, the Spiro. For 9mm, the Fly 9. For rimfire, the 22 Take Down.

What is the best budget Thunder Beast suppressor?

The Spiro is the lowest-priced TBAC rifle suppressor we carry. Among the precision rifle suppressors, the Ultra 5 is the lowest-priced.

What do CB, SR, BA and HUB mean?

They're the mount types. CB (Compact Brake) is TBAC's standard taper mount for the Ultras and Magnus. SR (Secondary Retention) adds a locking collar and is the only full-auto rated TBAC rifle mount. BA (Brake Attach) is the larger mount on the 338 Ultra. HUB is the standard 1.375x24 thread for third-party mounts.

What is the difference between the Ultra and the Magnus?

The Ultras are 1.5 in. in diameter and lighter. The Magnus line is 1.8 in., quieter at each length, rated up to .300 Norma Mag, and available with SR (full-auto rated) and HUB mounts. The Ultras come in CB and direct thread.

What does RR mean on a Thunder Beast suppressor?

RR is Reduced Recoil, also called Race Ready. It replaces the flat end cap with a brake on the front of the suppressor. On .300 Win Mag, the Magnus RR models cut recoil by over 60% compared with a bare muzzle, versus 29% for a standard Magnus. RR adds 1.5 in. and about 2.4 oz and is louder at the shooter's ear.

Which Thunder Beast suppressors are full-auto rated?

The SR versions of the Magnus, Magnus S, Magnus K and 338 Ultra, the Spiro, the Fly 9 on 9mm, the Fly 45 on .45 ACP, 9mm and 300 BLK, and the 22 Take Down on .22 LR. The Ultras and the CB, BA and HUB versions of the Magnus and 338 Ultra are not full-auto rated.

What happened to the Dominus?

TBAC retired the Dominus line in January 2026 when it introduced the Spiro. The Magnus S and Magnus K replace the Dominus and Dominus K, and the Spiro replaces it on 5.56 gas guns.

Can I put a Thunder Beast suppressor on a HUB mount?

Yes, with the HUB versions of the Magnus, Magnus S, Magnus K, Spiro and Fly 45. They ship without a mount and take third-party HUB mounts like SilencerCo ASR, Dead Air Key-Mo and Xeno, and Q Plan-B. The Energetic Armament Thunder Beast HUB Mount lets a HUB suppressor use your TBAC CB brakes.

What is the Thunder Beast Silencer Summit?

It's a sound testing event TBAC hosts every August at its facility in Cheyenne, Wyoming, open to any suppressor maker. Every suppressor is tested on the same rifles, ammunition and microphones, and TBAC publishes the full results. At the 2025 Summit, the Magnus RR had the lowest reading of the 61 .30 caliber setups on .300 Win Mag, and the Magnus had the lowest of the 70 .30 caliber setups on subsonic 300 BLK. TBAC runs the test and also makes some of the suppressors in it.

What is the lightest Thunder Beast suppressor?

The 22 Take Down at 4.8 oz. For centerfire, the Fly 9 in its short setup at 5.5 oz. For rifles, the Ultra 5 at 6.0 oz.

Ready to Buy Your Thunder Beast Suppressor?

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