Dirti™ 8 Suppressor
Price range: $995.00 through $1,095.00
LOW STOCK
Out of Stock
The next run of Dirti™ 8 suppressors is expected back in stock by mid‑December.
Precision. Performance. Power.
The Dirti™ 8 is Fierce Firearms’ first suppressor, held to the same standard as our rifles: precision built, field proven, and engineered for hunters who count ounces. Constructed of 100% Grade 5 titanium with eight fully welded baffles, it delivers an average sound reduction to 134.4 dB with .308 Win in a can that weighs as little as 9.9 oz — light enough to live on your mountain rifle instead of in your safe.
The OBX over-barrel extension is what sets the Dirti 8 apart. With the OBX installed, a portion of the suppressor’s 9.75″ length rides back over the barrel, keeping weight and length closer to your hands for better balance and a quicker-pointing rifle. Prefer a conventional mount? Swap to the flush endcap and run it at 6.83″ and 9.9 oz. A flush mount endcap is included allowing for direct thread on 5/8-24 barrels.
Dirti™ 8 FAQ
Can the Dirti 8 handle the 7mm Backcountry (80,000 PSI)?
The Dirti 8 is rated for the 7mm Backcountry. It’s built from 100% Grade 5 titanium with eight fully welded baffles and is rated from .22 Hornet up through .300 RUM.
What cartridges is the Dirti 8 rated for?
The Dirti 8 is a .30 caliber suppressor rated for centerfire cartridges from .22 Hornet up to .300 RUM. Popular hunting cartridges it’s rated for include:
- 5.56 NATO
- 6.5 Creedmoor and 6.5 PRC
- .308 Win
- 7mm PRC, 7mm Rem Mag and 7mm Backcountry
- 28 Nosler
- .300 Win Mag, .300 PRC and .300 RUM
Not sure about your cartridge? Contact us before you buy and we’ll confirm.
What’s the minimum barrel length for the Dirti 8?
| 5.56 NATO | 10.5″ |
| .308 Win | 16″ |
| .300 RUM | 18″ |
Shorter barrels produce higher muzzle pressure and blast. Staying at or above these lengths keeps the suppressor within its rating. Running a different cartridge? Contact us before you shoot it.
What’s the maximum barrel diameter that fits inside the OBX?
The OBX over-barrel extension clears barrels up to .905″ in diameter, measured where the OBX sleeve overlaps the barrel (roughly the last 3.25″ behind the threads).
That fits most carbon-wrapped barrels as well as sporter, light-sporter and other slimmer steel profiles. On carbon fiber barrels, use caution with the OBX, because heat from the suppressor can degrade the barrel. When in doubt, remove the OBX and use the flush endcap.
If your barrel is too large for the OBX, use the included flush endcap to direct-thread the Dirti 8 instead.
What’s the difference between the OBX and flush mount?
Both are included. The OBX (over-barrel extension) slides part of the suppressor back over your barrel, so it adds less overall length and keeps the weight closer to your hands for better balance and a quicker-pointing rifle. The flush endcap direct-threads onto the barrel for the lightest, shortest standalone package.
| Length, OBX | 9.75″ overall (part rides over the barrel) |
| Length, flush mount | 6.83″ |
| Weight | As little as 9.9 oz (flush mount) |
| Outside diameter | 1.70″ |
What thread pitch does the Dirti 8 use?
The Dirti 8 ships with 5/8-24 mounts (OBX and flush endcap). 1/2×28 direct-thread mounts are sold separately.
How quiet is it?
The Dirti 8 averages 134.4 dB with .308 Win. Results vary with cartridge, load and barrel length. No suppressor makes a rifle hearing safe, so always wear ear protection.
Can I use it on a semi-auto or for rapid fire?
The Dirti 8 will mount on a semi-auto with the right thread, but rapid fire is not recommended. Extreme heat can weaken the titanium and cause the suppressor to fail. Let it cool every 5–10 shots depending on cartridge, and never cool it with water or snow.
How do I clean it?
Clean the threads with a gun-specific carbon solvent and a brass or nylon brush. For heavy carbon buildup, remove the mounts and endcaps and soak all parts in carbon solvent. Avoid acetone and chlorine-based cleaners, and never push rags or patches through the baffle stack.
Every so often, loosen the endcaps and mounts to check for galling. If they get tight, clean the threads and apply a thin layer of copper anti-seize. Full instructions are in the Dirti 8 owner’s manual.
What does it take to buy a suppressor?
Suppressors are NFA items. As of January 1, 2026, the federal tax stamp for suppressors is $0, but you still need an approved ATF Form 4, fingerprints and a background check, and suppressors have to be legal in your state. Your transferring dealer can walk you through the process.
What’s the warranty?
The Dirti 8 is covered by a limited lifetime warranty. To keep it valid, follow the guidelines in the owner’s manual.
Still have a question?
Our customer service team is happy to help: customerservice@fiercearms.com | (435) 462-0042
