Small Size, Big Performance
The Scorpius silencer crushes it on short-barrel semi-auto pistols—a notoriously tough platform for .22 suppressors. We’re talking super low first-round pop (FRP) and ear-safe suppression that lands in the mid-70s dB at the shooter's ear. Translation? It’s impressively quiet—basically ghost-level stealth to your ears.
In its size class, Scorpius stands alone. Sure, others comes close, but it just can’t match this silencer’s performance on a compact host. And when it comes to shot consistency, Scorpius delivers. No random loud bangs—just smooth, reliable suppression, even on tricky hosts like the Beretta 21A.
Try it on your small semi-auto and let us know what you think!
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Sound Signature Review™
This page contains links to detailed Sound Signature Reviews of each silencer/host combination contained in the repository of Test Results, in accordance with the Silencer Sound Standard. We are excited to provide you with the best and most meaningful silencer sound reviews available. All reviews contain a Suppression Rating, only from PEW Science!
PEW Science is an independent private testing laboratory and also hosts the world’s only independent public suppressed small arms research cooperative. Testing, data analysis, and reporting for public research is generated with funding provided by PEW Science members. Any test data that is generated with any portion of private funding contains this disclosure. The testing and analysis production for this Sound Signature Review was funded in part by PEW Science Project PEW-OG-104-001-24. Therefore, data pertaining to the Scorpius in this Sound Signature Review is published with the express written permission of Rough Rider Technology.
Off Grid Suppressors Scorpius on a Beretta 21A Subcompact Semiautomatic Pistol
The Scorpius from Off Grid Suppressors (Off Grid) is a compact and lightweight 22 caliber rimfire silencer, intended to suppress the .22LR cartridge. It has a 1-inch diameter and is 5 inches long. The silencer is entirely constructed of DMLS (3D-printed) titanium. The silencer may be installed on host weapons threaded 1/2”-28-tpi and weighs 2.2 ounces, as tested. The Scorpius can be obtained from Off Grid Suppressors and Silencer Central.
| Test Specimen | Test Goal | Average Maximum Sound Pressure [dB] | Average Maximum Sound Impulse [dB-ms] |
| Off Grid Scorpius | .22LR silencer, subsonic signature (subcompact pistol) | 126.0 (muzzle) 126.1 (ear) | 102.9 (muzzle) 104.8 (ear) |
Scorpious 22 Suppression Rating 82.0
This Sound Signature Review contains single-test results using the Off Grid Suppressors Scorpius mounted to the Beretta 21A subcompact semiautomatic pistol, chambered in .22LR with a 2.4-inch barrel. CCI Standard Velocity 40gr ammunition was used in the test.
When paired with the Beretta 21A subcompact semiautomatic pistol and fired with CCI SV .22 LR ammunition, the Off Grid Scorpius achieved a composite Suppression Rating™ of 82.0 in PEW Science testing.
As with all weapon systems, the user is encouraged to examine both muzzle and ear Suppression Ratings.
Muzzle Sound Signature Test
A summary of the principal Silencer Sound Standard performance metrics of the Off Grid Suppressors Scorpius is shown below. The data acquired 1.0 m (39.4 in) left of the muzzle is available for viewing to all. The data acquired 0.15 m (6 in) right of the shooter’s ear is only available to membership supporters of PEW Science and the Silencer Sound Standard.
Suppression Rating Comparison - Semiautomatic Subsonic .22 LR
The Off Grid Scorpius was developed to maximize pure sound signature reduction (PEW Science Suppression Rating) regardless of rimfire host, in a very lightweight design envelope. Figure 6 shows a performance comparison of rimfire silencer configurations tested on a subcompact semiautomatic pistol shown in public PEW Science testing, to date. Suppression Ratings are shown for both the shooter and bystanders.
The performance of the Off Grid Scorpius on the short-barrel subcompact semiautomatic rimfire pistol platform is high; not only for its size, but in general. The use of annular lattice structure is postulated to produce higher performance efficiency than the similarly designed Pluto silencer on this host weapon. The Off Grid Scorpius exhibits the 2nd highest shooter’s ear (operator) sound field suppression performance on this host weapon system in the current dataset. Only the CAT SR exceeds its performance; the CAT SR being both longer and more advanced (see Research Note 4).
The performance gap between the Scorpius and configurations like the short configuration of the Rugged Oculus are nontrivial; the two configurations have a differential of several categories on the Suppression Rating scale. With a high degree of FRP masking performance, light weight, small size, and significant pistol suppression performance, the Scorpius represents a significant performance benchmark for hybrid design rimfire silencers in the current state of practice.
The consistency of the Off Grid Scorpius pays significant dividends in total pressure field suppression performance and enables it to nominally exceed the shooter’s ear suppression performance of the Otter Creek Labs Titanium and exceed the performance of the Resilient Suppressors Jessie’s Girl in totality, in a smaller and lighter design.
The signature of a high performance rimfire silencer with subsonic ammunition fired from a semiautomatic pistol is significantly suppressed and may not sound like a “gunshot” to the operator or to bystanders. When such systems enter the 80-zone on the Suppression Rating scale on a reciprocating weapon, the signatures have a large proportion of audibly discernable mechanical noise. It is important for operators and bystanders to remain cognizant of the potential hazards of firearm use and the potential lethality of such weapon systems; the operation of such systems, if not in accordance with weapon and silencer manufacturer instructions, may still result in serious injury or death. The user is encouraged to be mindful of the degree to which sound signature suppression, and resulting personnel hazards, can vary across designs. Small arm weapon system suppression performance is a spectrum. The PEW Science Suppression Rating and the Silencer Sound Standard help quantify this spectrum for end users and industry, objectively.
Review Summary: Off Grid Suppressors Scorpius on a Beretta 21A Subcompact Semiautomatic Pistol
When paired with the Beretta 21A subcompact semiautomatic pistol and fired with CCI SV .22 LR ammunition, the Off Grid Scorpius achieved a composite Suppression Rating™ of 82.0 in PEW Science testing.
As with all weapon systems, the user is encouraged to examine both muzzle and ear Suppression Ratings.
PEW Science Laboratory Staff Opinion:
The Off Grid Suppressors Scorpius is a compact and lightweight rimfire silencer that exhibits extremely competitive suppression performance on short-barrel rimfire systems such as pistols. The silencer is 3D-printed from titanium and may be cleaned with a variety of chemical solutions. At only 5 inches long, and weighing approximately 2.2 ounces, the Off Grid Scorpius demonstrates extremely competitive overall performance not only for its size, but also relative to larger rimfire silencers.
The Off Grid Scorpius is very similar in design, size, and weight to the Mercy Firearms Pluto. However, unlike the Pluto, the Scorpius possesses an inner lattice structure around the main baffle core. PEW Science laboratory testing indicates the lattice specifically increases suppression efficiency; it is postulated that the increased turbulence that increases the efficiency of heat transfer works in tandem with the increased surface area to do the same. Some unique performance features of the silencer include FRP quenching behavior that results in masking of relative FRP severity to bystanders on this short-barrel pistol host. This is a noteworthy performance trait, as FRP suppression with short barrels is a challenging performance requirement for all silencers in all combustion regimes. It is much more difficult for a rimfire silencer to suppress relative FRP severity on a short-barrel semiautomatic subcompact handgun than it is to do the same on a long-barrel bolt-action rifle.
The consistency of the Off Grid Scorpius pays significant dividends in total pressure field suppression performance and enables it to nominally exceed the shooter’s ear suppression performance of the Otter Creek Labs Titanium and exceed the performance of the Resilient Suppressors Jessie’s Girl in totality, in a smaller and lighter design. The performance gap between the Scorpius and configurations like the short configuration of the Rugged Oculus are nontrivial; the two configurations have a differential of several categories on the Suppression Rating scale. With a high degree of FRP masking performance, light weight, small size, and significant pistol suppression performance, the Scorpius represents a significant performance benchmark for hybrid design rimfire silencers in the current state of practice.
The Off Grid Scorpius silencer may not be disassembled, therefore, it must be cleaned by soaking it in a chemical solution, or in an ultrasonic cleaner. The user is encouraged to contact the manufacturer for maintenance recommendations, as rimfire platforms may produce a significant amount of lead buildup that can degrade suppression performance over time.
PEW Science has not evaluated the durability of the Off Grid Scorpius, nor its performance on cartridges other than subsonic .22 LR. It is important for the user to contact the manufacturer to determine the suitability of firing schedules and use cases.
In this review, the Off Grid Scorpius performance metrics depend upon suppressing a subsonic rimfire cartridge on a subcompact semiautomatic rimfire pistol, which is a difficult task. While the sound signature of such systems can be suppressed to levels that may not sound like a “gunshot” to the operator or to bystanders, PEW Science encourages the reader to remain vigilant with regard to all subsonic rimfire cartridge suppression claims. It is important for operators and bystanders to remain cognizant of the potential hazards of firearm use and the potential lethality of such weapon systems; the operation of such systems, if not in accordance with weapon and silencer manufacturer instructions, may still result in serious injury or death.
The hazard potential of subsonic rimfire pistol use is not insignificant. PEW Science encourages the reader to consider the Suppression Rating when deciding on an appropriate silencer and host weapon combination for their desired use.