The OSS RAD22 is a 6.2 oz, 5.57 inch flow-through rimfire suppressor that vents gas forward through the muzzle cap. On a KelTec CP33 over several hundred rounds it reduced blowback compared with the baffle cans I had used, kept the pistol cycling, and was still clean and easy to take apart. OSS rates it at 115 to 119 dB with CCI Standard Velocity.
Status: OSS is now HUXWRX, which lists the RAD22 as discontinued with limited availability.
Specs and the verdict come first, then the full review.
Table of contents
OSS RAD22 Specs
| OSS RAD22 | |
|---|---|
| Design | Flow Baffle, flow-through |
| Materials | Titanium and 17-4 stainless |
| Thread | 1/2×28 |
| Weight | 6.2 oz |
| Length | 5.57 in |
| Diameter | 1.08 in |
| Rating | Full auto 5.7×28 (maker rating) |
| Sound (maker) | 115 to 119 dB, .22 LR CCI SV; 130 to 133 dB, 8 in 5.7 rifle |
Verdict
- Good: less blowback, cleaner gun and can, tiny and light, simple to strip.
- Know this: discontinued, and my test was a few hundred rounds on one host.
Compare current cans in our .22 suppressor rankings.
The host was the KelTec CP33; for a current HUXWRX can, read our HUXWRX Ventum 762 review.
🛒 Search GunsAmerica for OSS RAD22 listings
There are a ton of different 22LR suppressors out there on the market, but all of them have one drawback due to the nature of the cartridge itself: they get extremely dirty. OSS set out to fix that with OSS‘s new flow-through 22 caliber suppressor. Because of the unique design of the “Flow Baffle,” the expanding gasses are slowed and routed radially, between the outer tube and the core to then exit out of vent holes at the muzzle. This high-pressure flow carries with it a ton of lead and carbon into the open atmosphere, keeping the inside much cleaner than traditional cans.
For this review, I am using a KelTec CP33, a brace adapter (Rehv Arms and Farrowtech), and a Crimson Trace CTS-1000 red dot sight.
Initial Impression
When initially examining the RAD22, I noticed just how much thought went into designing it. All of the lines of the suppressor are very clean and elegant, there are no tooling marks that are visible, and it is tiny. I popped this little can open by removing the end cap, and all of the internals slid out into my hand when I turned it over. The tolerance seemed to be extremely low between the outside diameter of the Flow Baffle and the inside diameter of the tube which maximizes the efficiency of this design. The suppressor has a fairly simple design which makes it extremely easy to put back together and hard to get wrong.
Hypothesis: The RAD22 will stay cleaner than traditional suppressors.
In theory, the RAD22 will stay cleaner than traditional suppressors because it allows all of the carbon and lead containing gasses to exit through the muzzle end. To test this, I have the perfect host gun: a KelTec CP33. I’ve shot this pistol a ton while it was suppressed utilizing a traditional baffle stack design. The biggest problem was caused by all of the excess blowback into the chamber creating a carbon buildup on the bolt face, and other mechanical interfaces which then rendered the gun unreliable after only a few hundred rounds. I did not experience this kind of problem when shooting un-suppressed, so I attributed this problem to the extra pressure that the suppressor supplied. On top of that, the filthy 22LR cartridge was filling up the can with lead and carbon, which decreased its efficiency and increased weight.
Function Test
I expect the RAD22 to reduce the back-pressure and gasses coming back through the chamber when compared to normal cans because of the flow-through technology that OSS utilizes in their “Flow Baffle.” This leads me to believe that the gun will stay cleaner for longer because less lead and carbon will be blown back into action. On top of it all, because of my experience with OSS products in the past, I expect this can to sound good, with a low tone.
After my testing, I determined that my hypotheses were true: The can reduced back-pressure when compared to traditional cans, the sound was low toned. Disassembly after several hundred rounds was incredibly easy with the provided multi-tool and a screwdriver (for uncoupling the last two cone baffles.)
Final Verdict
After putting several hundred rounds through the RAD22, I found reduced back-pressure on my semi-auto guns when compared to traditional suppressors. This keeps the gun itself cleaner, allowing it to cycle reliably. This technology also keeps the suppressor cleaner, which is very important in a 22lr suppressor because rimfire is notoriously dirty and suppressors designed for them are high maintenance. It is also very important to note that the RAD22 is full-auto rated for 5.7x28mm! With its tiny profile and light-weight coupled with its robustness, the RAD22 was one of the best rimfire cans I had used.
Specifications
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FAQ
Is the OSS RAD22 still made?
No. HUXWRX lists it as discontinued with limited availability.
How much does the OSS RAD22 weigh?
6.2 oz, at 5.57 inches long.
Does the RAD22 stay cleaner?
In my several hundred rounds, both the pistol and the can stayed cleaner than with baffle cans I had used.
Riley Baxter is a seasoned hunter, outdoorsman, and competitive shooter with deep roots in the backcountry. He has guided professionally for bears, bighorn sheep, and other big game across rugged terrain, bringing firsthand knowledge of what gear actually works in the field. When he’s not chasing game or running drills on the range, Riley is likely in the garage customizing his rifles, pistols, or backcountry kit.
A competitive pistol shooter and lifelong firearms enthusiast, Riley brings both precision and creativity to every piece of equipment he touches. Outside of the gun world, he works as a perfusionist in Montana, a vital role in heart surgery that demands attention to detail, critical thinking, and mental fortitude.
Experience:
– Professional Hunting Guide – Guided for bears, bighorn sheep, and more in some of the West’s toughest country.
– Competitive Shooter – Skilled USPSA pistol shooter with a passion for precision and performance under pressure.
– Custom Builder – Enjoys building and tuning firearms and equipment to meet the exact demands of the hunt or the range.
– Experienced Marksman – Experienced in long-range hunting and precision rifles to meet the demands of the terrain of the West.
– Montana-Based Perfusionist – Medical professional accustomed to making critical decisions in high-stakes environments.
Does the radial design change the recoil dynamics? Push the gun to one side or the other? Compared to other cans?
Not that i can tell. Angular momentum is a real thing so that is a great question. My pseudo-science answer would be: the gasses spinning around the bore do not have enough mass to create a noticeable force on the firearm.
Would love to know more on price and availability
I did a form4 end of February and got it back mid December 2013.they were supposed to add people and expedite transfers. But more people are buying stamp toys! If you really want to speed it up reduce the nfa to machine guns and cannon/ shells/grenades and bombs. Cans are a accessory and the govt shouldnt concern itself with gun dimensions. But i dream
“the expanding gasses are slowed and routed radially, . . . to then exit out of vent holes at the muzzle. This high-pressure flow carries with it a ton of lead and carbon into the open atmosphere, keeping the inside much cleaner than traditional cans.”
Ahh, tis better to poison the atmosphere with lead than suffer the ignominy of having a dirty can…
Its no more crap than a unsuppressed gun would expell but heres the diff,
I have experience with the silencerco sparrow.although it easy to take apart and clean its messy and unless you wear chemical gloves you expose yourself to lead.
This new design minimizes that to a degree.nope i dont own stock but if someone can tell me where to buy id be buying
How long a wait to get it after you bought it? Basically from start to end how long does a person wait to be able to take possession of the suppressor?
About 13 months is the current wait time, sadly :/
I did a form4 end of February and got it back mid December 2013.they were supposed to add people and expedite transfers. But more people are buying stamp toys! If you really want to speed it up reduce the nfa to machine guns and cannon/ shells/grenades and bombs. Cans are a accessory and the govt should concern itself with gun dimensions. But i dream