SSS.6.125 - Resilient Suppressors Jessie's Girl and the CZ 452 .22 Bolt-Action (Free Version)
/Resilient Suppressors Jessie's Girl on a CZ 452 .22 Bolt Action with 16-in Barrel
The “Jessie’s Girl” is manufactured by Resilient Suppressors. It is a 22 caliber rimfire silencer, intended to suppress cartridges ranging from .22LR to 5.7x28mm. It has a 1.06-inch diameter is 5.4 inches long from base to endcap flash-hiding features. The silencer tube is constructed from titanium, while its mount and removable baffles are 17-4 heat treated stainless steel. The removable endcap of the silencer is constructed from 7075-T6 aluminum. The silencer may be installed on host weapons threaded 1/2”-28-tpi. In this test, an adapter was used to convert the native host weapon threads from 1/2”-20tpi. The silencer weighs 6.0 ounces, as tested. The Jessie’s Girl can be obtained from Resilient Suppressors dealers.
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 data production for this Sound Signature Review white paper was funded in part by PEW Science Project PEW-RS-062-001-23. Therefore, data pertaining to the Jessie’s Girl silencer in this Sound Signature Review is published with the express written permission of Resilient Suppressors LLC.
This Sound Signature Review contains single-test results using the Jessie’s Girl mounted to the CZ 452 American bolt-action rifle, chambered in .22LR with a 16-inch barrel. CCI Standard Velocity 40gr ammunition was used in the test.
- Section 6.125.1 contains the Jessie's Girl test results and analysis.
- Section 6.125.2 contains Suppression Rating comparisons with selected .22 rimfire silencers in the subsonic cartridge regime.
- Section 6.125.3 contains the review summary and PEW Science laboratory staff technical opinions.
Summary: When paired with the CZ 452 American bolt-action rifle and fired with CCI SV .22 LR ammunition, the Jessie’s Girl achieved a composite Suppression Rating™ of 92.2 in PEW Science testing.
As with all weapon systems, the user is encouraged to examine both muzzle and ear Suppression Ratings.
Relative Suppression Rating Performance is Summarized in SSS.7 - PEW Science Rankings
6.125.1 Resilient Suppressors Jessie's Girl Sound Signature Test Results
A summary of the principal Silencer Sound Standard performance metrics of the Jessie’s Girl is shown in Table 1. 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. You can support public PEW Science testing, research, and development with a membership, here. State-of-the-art public firearm sound signature testing and research conducted by PEW Science is supported by readers like you.
Table 1. Resilient Suppressors Jessie’s Girl Sound Metric Summary
6.125.1.1 SOUND SIGNATURES AT THE MUZZLE
Real sound pressure histories from a 5-shot test acquired with PEW-SOFT™ are shown below. The waveforms are not averaged, decimated, or filtered. The data acquisition rate used in all PEW Science laboratory sound signature testing is 1.0 MS/s (1 MHz). The peaks, shape, and time phasing (when the peaks occur in relation to absolute time and to each other) of these raw waveforms are the most accurate of any firearm silencer testing publicly available. PEW-SOFT data is acquired by PEW Science independent laboratory testing; the recognized industry leader in silencer sound research. For more information, please consult the Silencer Sound Standard.
The primary sound signature pressure histories for all 5 shots are shown in Figure 2a. A zoomed-in timescale displays the region of peak sound pressure in Figure 2b, for the first three shots. The real sound impulse (momentum transfer potential) histories from the same 5-shot test are shown in Figure 3. Again, full and short timescales are shown.
Fig 2a. Resilient Suppressors Jessie’s Girl Subsonic .22 LR Bolt Action Muzzle Sound Pressure Signature
Fig 2b. Resilient Suppressors Jessie’s Girl Subsonic .22 LR Bolt Action Muzzle Sound Pressure Signature, Short Time Window
Figure 3a. Resilient Suppressors Jessie’s Girl Subsonic .22 LR Bolt Action Muzzle Sound Impulse Signature
Figure 3b. Resilient Suppressors Jessie’s Girl Subsonic .22 LR Bolt Action Muzzle Sound Impulse Signature
The Resilient Suppressors Jessie’s Girl exhibits nominal first-round-pop (FRP) to bystanders that is not significant on the rifle used in this test. The signature is relatively consistent, as expressed in pressure space (Figure 2) and impulse space (Figure 3). The subsonic pressure waves reach peak amplitude in the negative phase (Figure 2b); this is typical throughout the shot string. Note that the highest impulse accumulation measured at the muzzle results from the primary pressure wave. The longer duration gas phase results in secondary accumulation in later time (31.8 ms, Figure 3b).
The silencer utilizes a traditional stepped-cone baffle geometry with varying notch alignment. In the low pressure regime, it provides relatively high suppression performance. The rimfire silencer performance Rankings are now expanding; Jessie’s Girl joins the Rugged Oculus in the current published dataset. The Rugged Oculus was also tested on this bolt-action host weapon in both its long and short configurations (SSS.6.1). Both configurations of the Oculus were also tested on the Beretta 21A semiautomatic pistol (SSS.6.2).
PEW Science Research Note 1: Users should note that performance of rimfire silencers on long and short barrels may be significantly different, even with subsonic ammunition, depending on silencer design. Semiautomatic testing of the Jessie’s Girl on the Beretta 21A rimfire pistol by PEW Science is forthcoming.
Sound signatures at the shooter’s ear on only available in the Member Version of this article.
6.125.2 Suppression Rating Comparison - Subsonic .22 LR
The Resilient Suppressors Jessie’s Girl was developed to maximize pure sound signature reduction (PEW Science Suppression Rating) on both low and high pressure rimfire hosts (e.g. bolt-action rifle and semiautomatic pistol). Semiautomatic pistol testing of the Jessie’s Girl is forthcoming. Figure 6 shows a performance comparison of rimfire silencer configurations tested on a bolt-action rifle shown in public PEW Science testing, to date. Suppression Ratings are shown for both the shooter and bystanders.
Figure 6. Suppression Rating Comparisons Of Rimfire Silencers Using PEW-SOFT subsonic .22 LR Bolt-Action Test Data
The Resilient Suppressors Jessie’s Girl is a high performance rimfire silencer. To bystanders, the Jessie’s Girl produces a signature on a bolt action .22 LR rifle that is similar in severity to the long configuration of the Rugged Oculus (6.1). At the shooter’s ear, the Jessie’s Girl also exhibits high performance, with a small increase in loudness compared to the Oculus.
From the above data, it can be concluded that both the Jessie’s Girl and the long configuration of the Oculus produce signatures that are less severe on this weapon system than the short configuration of the Oculus. This comparison is valid for both the operator and for bystanders. It is important to note that the performance of truncated versions of silencers is not necessarily uniform across silencer designs.
Users should also note that performance of rimfire silencers on long and short barrels may be significantly different, even with subsonic ammunition, depending on silencer design. Semiautomatic testing of the Jessie’s Girl on the Beretta 21A rimfire pistol by PEW Science is forthcoming.
The signature of a high performance rimfire silencer with subsonic ammunition fired from a bolt-action rifle, at the shooter’s head, is significantly suppressed and may not sound like a “gunshot” to the operator or to bystanders. 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.
6.125.3 Review Summary: Resilient Suppressors Jessie's Girl on a CZ 452 .22 Bolt Action with 16-in Barrel
When paired with the CZ 452 American bolt-action rifle and fired with CCI SV .22 LR ammunition, the Jessie’s Girl achieved a composite Suppression Rating™ of 92.2 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 Resilient Suppressors Jessie’s Girl is a high performing rimfire silencer on a bolt action rifle with subsonic ammunition. It is rated for up to 5.7x28mm for machine gun use, and weighs 6.0 ounces. The silencer exhibits nominal first round pop in the tested combustion regime, and is also user-serviceable. Maintenance may be performed by cleaning the 17-4 heat treated stainless steel baffles in an ultrasonic cleaner or with solvents, following manufacturer instructions.
The Jessie’s Girl is relatively light for its firing schedule rating. This is due to the use of titanium in its tube construction, as well as its aluminum end cap. PEW Science has not evaluated the durability of the Jessie’s girl, nor its performance on cartridges other than subsonic .22 LR.
Cleaning of the stainless steel baffles is needed in accordance with manufacturer guidelines, and disassembly of the Jessie’s Girl to facilitate such cleaning is relatively straightforward. The endcap may be removed by hand, and if tool assistance is needed, a 12-point socket may be used. The endcap possesses flash hiding features; this is reported by the manufacturer to be intended to assist with visual signature reduction when used with the 5.7x28mm cartridge. PEW Science has not evaluated the flash reduction of this silencer, nor its 5.7x28mm suppression performance.
In this review, the Resilient Suppressors Jessie’s Girl performance metrics depend upon suppressing a subsonic rimfire cartridge on a bolt-action rifle. 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 rifle 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.
