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Unknown Suppressors Buying Guide

Unknown Suppressors builds 3D printed titanium suppressors for hunters in Post Falls, Idaho, each one printed as a single piece of Grade 23 titanium. We sell the Reaper, OG 30, OG 6.5 and OG 6-S, and we can get the NHS, Gnat and Midge. The sections below compare the models and explain where each one fits.

How to Choose an Unknown Suppressor

Unknown makes two kinds of hunting suppressors. The Reaper hangs entirely off the muzzle on a HUB mount, so you can move it between rifles. The OG slides back over the barrel, so it adds less length and keeps the rifle balanced, but it's harder to move around and is typically used on one rifle. Choose the type first, then match the bore to your caliber.

A few things to know

• Over the barrel: an over-the-barrel (reflex) suppressor slides back over the end of your barrel. The OG 30 is 8 in. long, but only 4 in. of it sticks out past the muzzle. See the over-the-barrel pros and cons.
• Build: every Unknown is 3D printed as one piece of Grade 23 titanium, with no welds and no threaded joints in the body, so it can't be taken apart.
• Heat: keep it under 800°F. Titanium loses strength at high heat, so these are built for hunting and precision rifles, not long strings of rapid fire.
• Match the bore: a bore matched to your caliber typically improves suppression by about 1 to 3 dB, depending on the size. That's why the OG comes in .30 cal, 6.5mm and 6mm.
• Sound numbers: the dB ratings in this guide are Unknown's own. The ones marked 2026 Silencer Summit are independent test results.
• Colors: the Reaper, OG 30, OG 6.5 and OG 6-S come in Black, FDE, OD Green, Sniper Grey.

Choosing by configuration

• One .30 cal suppressor for several rifles: the Reaper, 6 in. and 8.8 oz with its direct thread adapter, on a HUB mount.
• A short, balanced .30 cal hunting rifle: the OG 30, 8.6 oz, only 4 in. past the muzzle.
• 6.5 Creedmoor or 6.5 PRC: the OG 6.5, 7.4 oz, only 4 in. past the muzzle.
• 6mm Creedmoor: the OG 6-S, 6.4 oz, only 3 in. past the muzzle.
• .22 LR: the Gnat and Midge, 2.4 oz and 2.8 oz.
• Competition, where muzzle blast and recoil matter more than sound: the NHS.

Available by pre-order: the NHS, Gnat and Midge, plus any Unknown we carry that's out of stock. Call us at 512-879-1068 to pre-order one. You can also sign up for the back-in-stock email on any product page.

Which Unknown Suppressor Should You Buy?

What Unknown Suppressors Is Known For

Unknown builds suppressors for hunters. Its silencers are 3D printed, machined, Cerakoted and inspected under one roof in Post Falls, Idaho, and the over-the-barrel OG is the design that started the lineup.

• Light weight: the OG 6-S is 6.4 oz, the OG 6.5 is 7.4 oz, and the Reaper is 8.8 oz with its adapter.
• Balance: the OG sits partly over the barrel, so the weight stays closer to your hands and the rifle doesn't feel muzzle-heavy.
• One piece of titanium: printing each suppressor as a single piece of Grade 23 titanium means no welds and no threaded joints in the body.
• Tone: Unknown tunes its silencers for a lower, hollow tone rather than a sharp crack.
• Warranty: every Unknown suppressor has a limited lifetime warranty.

Over-the-Barrel (Reflex) Suppressors: Pros and Cons

An over-the-barrel suppressor, also called a reflex suppressor, slides back over the end of your barrel, so part of it sits behind the muzzle. The OG is built this way. The Reaper isn't; it sits entirely in front of the muzzle.

Why it helps

• A shorter rifle: the OG 30 is 8 in. long, but it only adds 4 in. past the muzzle. The OG 6-S adds 3 in.
• Better balance: with part of the can over the barrel, the weight sits closer to your hands, so the rifle doesn't feel muzzle-heavy when you carry it or shoulder it.
• More volume without more length: the space around the barrel gives the gas more room to expand, without adding length past the muzzle.
• Tone: the OG is tuned for a lower, hollow tone, not a sharp crack.

What to watch for

• Barrel fit: your barrel has to be 0.750 in. or less in diameter over the part the suppressor covers. Measure before you order; a heavy-contour or carbon-fiber barrel can be too thick.
• Direct thread only: the OG threads straight onto a 5/8x24 barrel with no quick-detach option.
• Pick the right bore: choose the OG made for your caliber: .30 cal, 6.5mm or 6mm. A matched bore is typically about 1 to 3 dB quieter.

If you want one silencer for several rifles, or your barrel is too thick, look at the Reaper.

Unknown Reaper

Unknown OG Suppressors: OG 30, OG 6.5 and OG 6-S

The OG is Unknown's over-the-barrel suppressor, made in three bore sizes. Each one threads onto a 5/8x24 barrel and slides back over it, so most of the suppressor sits behind the muzzle. Your barrel has to be 0.750 in. or less in diameter over the part it covers. Because the OG threads straight on, it's best dedicated to one rifle. See the over-the-barrel pros and cons.

Unknown NHS, Gnat and Midge

How Unknown Compares

The tables below compare the Unknown suppressors we carry with similar suppressors from other brands. Lengths and weights come from our product pages.

Reaper and OG 30 vs. other light .30 cal suppressors

All of these were tested on the same 20 in. .308 bolt gun with M118LR at the 2026 Silencer Summit. The number is the sound level at the shooter's ear, so lower is quieter.

Sound numbers from the 2026 Silencer Summit, hosted by Thunder Beast Arms.

The Reaper is the second quietest suppressor in the table and the shortest, less than half a dBA behind the TiTrex 300Ti. The OG 30 and the Dead Air Nomad Ti OTB, the two over-the-barrel cans, measured within a fraction of a dBA of each other, and the OG 30 is 1.9 oz lighter. See the Precision Armament, Dead Air, SilencerCo, HUXWRX and Dillon buying guides for those silencers.

Unknown OG vs. Dead Air Nomad Ti OTB

The OG is lighter and sticks out less past the muzzle. The Nomad Ti OTB fits thicker barrels, up to 1 in., and its Xeno quick-detach mount lets you move it between rifles.

Unknown Mounts

• OG 30, OG 6.5 and OG 6-S: these thread straight onto a 5/8x24 barrel. There's no separate mount, so each one stays on its rifle.
• Reaper: the HUB (1.375x24) rear takes any HUB mount, and a 5/8x24 direct thread adapter comes in the box. For a 1/2x28 barrel, the Diligent Defense Ti Direct Thread Adapter is a light titanium option.
• Other thread pitches on the Reaper: several HUB direct-thread options are available. The SilencerCo Bravo Direct Thread Mount and the Dead Air direct thread mounts come in about ten thread pitches each.
• Quick-detach on the Reaper: a HUB adapter like the Plan-B by Q lets you move it between rifles with Plan B muzzle devices.
• Gnat and Midge: 1/2x28 direct thread, the standard .22 LR thread.

Shop all HUB mounts, or see our thread pitch chart.

Unknown Lineup at a Glance

Every Unknown is printed as one piece of Grade 23 titanium. Lightest centerfire suppressor: the OG 6-S at 6.4 oz. Shortest past the muzzle: the OG 6-S at 3 in.

Unknown Suppressors FAQ

Who makes Unknown Suppressors?

Unknown Suppressors is a suppressor maker in Post Falls, Idaho, that builds 3D printed titanium suppressors for hunters. Every silencer is printed, machined, Cerakoted and inspected in Post Falls, and each one is a single piece of Grade 23 titanium.

What is an over-the-barrel suppressor?

An over-the-barrel (reflex) suppressor slides back over the end of your barrel, so part of it sits behind the muzzle. The OG 30 is 8 in. long, but only 4 in. sticks out past the muzzle. That keeps the rifle shorter and puts the weight closer to your hands than a suppressor that sits entirely in front of the muzzle. See the over-the-barrel pros and cons.

Unknown Reaper vs. OG 30: which should I buy?

Pick the Reaper if you want to move one suppressor between rifles. It has a HUB rear, so it works with HUB direct thread mounts and quick-detach systems, and its end cap swaps between .30 cal and 6.5mm. At the 2026 Silencer Summit it measured 128.06 dBA at the shooter's ear on a 20 in. .308, against 129.77 for the OG 30. Pick the OG 30 for a dedicated hunting rifle: it adds only 4 in. past the muzzle, weighs 8.6 oz and threads straight onto a 5/8x24 barrel.

How quiet is the Unknown Reaper?

It's rated at 127 dB at the shooter's ear on a 20 in. .308 with M118. At the 2026 Silencer Summit, it measured 128.06 dBA at the shooter's ear on a 20 in. .308 bolt gun, 6th quietest of the 50 suppressors tested on that rifle.

How much does the Unknown Reaper weigh?

8.8 oz with its direct thread adapter, and 7.9 oz without it. It's 6 in. long and 1.8 in. in diameter.

What calibers can the Unknown Reaper shoot?

.30 cal and smaller, including 5.56, 300 BLK, 6mm Creedmoor, 6.5 Creedmoor and .308, with no barrel length limit on those. Short action magnums like 6.5 PRC and .300 WSM need a 16 in. barrel, and long action magnums like 300 Win Mag need 20 in.

Will an Unknown OG fit my barrel?

It will if your barrel is threaded 5/8x24 and is 0.750 in. or less in diameter over the part the suppressor covers: the last 4 in. on the OG 30 and OG 6.5, and the last 3 in. on the OG 6-S.

Should I get the OG 6.5 or the OG 30 for 6.5 Creedmoor?

The OG 6.5. Matching the bore to your caliber typically improves suppression by about 1 to 3 dB depending on the size, so the OG 6.5 is quieter than the OG 30 on 6.5mm and smaller cartridges. It's also lighter, at 7.4 oz.

Is the Unknown OG 6.5 the same as the OG Six-Five?

Yes. Unknown calls it the OG 6.5, and it's also sold as the OG Six-Five. It's 8 in. long with 4 in. over the barrel, weighs 7.4 oz and is rated at 129.5 dBA at the shooter's ear on a 24 in. 6.5 Creedmoor.

How hot can an Unknown suppressor get?

Keep it under 800°F. Titanium loses strength at high heat, so Unknown's centerfire silencers are built for hunting and precision rifles, where you're not running long strings of rapid fire.

Can you take apart an Unknown suppressor?

No. Every Unknown is printed as one piece of titanium, with no welds and no threaded joints in the body, so it can't be taken apart. The Reaper's end cap does unscrew so you can swap calibers.

What colors do Unknown suppressors come in?

The Reaper, OG 30, OG 6.5 and OG 6-S come in Black, FDE, OD Green and Sniper Grey. The Gnat and Midge come in Black.

What's the difference between the Unknown Gnat and Midge?

Length and weight. Both are one-piece titanium .22 LR suppressors on 1/2x28 threads. The Gnat is 4.5 in. and 2.4 oz, and the Midge is 5.5 in. and 2.8 oz. Unknown cleans both for free for life, since .22 LR runs dirty.

What is the Unknown NHS?

NHS stands for Not Hearing Safe. It's a 6.5mm competition suppressor with a built-in muzzle brake, designed to cut muzzle blast and recoil more than sound. It's 5.4 in. and 9.3 oz, and it mounts with a taper lock you time yourself, with no shims.

Do Unknown suppressors have a warranty?

Yes. Every Unknown suppressor has a limited lifetime warranty.

Shop Unknown Suppressors

Every Unknown suppressor purchase includes electronic filing, and your suppressor ships from our facility to your home. We can also provide an NFA trust and fingerprint kit, or you can upload an existing EFT file on our site.

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