SSS.6.40 - Research Supplement: The PEW Science Omega Back Pressure Metric (Public Article)

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SSS.6.40 - Research Supplement: The PEW Science Omega Back Pressure Metric (Public Article)

Firearm silencers reduce muzzle blast sound signature by restricting the rate at which combustion products exit the weapon system and are exposed to atmospheric conditions. Various silencer designs exhibit different flow rate restriction, dependent upon initial combustion product flow rate and amplitude, internal geometry, and even mounting characteristics that influence entrance aperture into the silencer assembly and flow interaction with internal geometry.

The subject of this publication is to present a non-intrusive method of flow restriction quantification, using existing externally measured data. A preliminary research quantity is presented: The PEW Science Back Pressure Metric, Omega.

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SSS.6.33 - Research Supplement: 30 Caliber Hunting Silencers - First Round Pop (Members Only)

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SSS.6.33 - Research Supplement: 30 Caliber Hunting Silencers - First Round Pop (Members Only)

Eight silencers evaluated by PEW Science are included in this members-only Research Supplement to examine relative First Round Pop (FRP) performance characteristics. The silencers in this group were selected for their applicability and market popularity for use as hunting silencers; silencers possessing length and/or weight characteristics making them conducive to field use on bolt-action rifles.

This research supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations and to help frame objective loudness comparisons between the eight silencers in the FRP signature regime. This supplement is part of ongoing PEW Science small arm weapon system sound signature research.

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SSS.6.21 - Research Supplement: Helios QD, Sandman-Ti, and Thunder Chicken Further Analysis

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SSS.6.21 - Research Supplement: Helios QD, Sandman-Ti, and Thunder Chicken Further Analysis

The previous Sound Signature Reviews of the CGS Helios QD (6.13), Dead Air Sandman-Ti (6.19), and Q Thunder Chicken (6.20) presented typical sound signatures of the silencers on a .308 bolt-action rifle with an 20-inch barrel.

This members-only research supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations in the aforementioned reviews and to help frame objective loudness comparisons between the three silencers. This supplement is part of ongoing PEW Science small arm weapon system sound signature research.

The three silencers in this comparative analysis were included based upon their similar or overlapping categories of physical characteristics and performance parameters, such as length, weight, suppression, and back pressure.

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SSS.6.18 - Intermediate Results Summary: Compact and Mid-Size .308 Rifle Silencers - Suppression and Back Pressure

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SSS.6.18 - Intermediate Results Summary: Compact and Mid-Size .308 Rifle Silencers - Suppression and Back Pressure

The previous Sound Signature Reviews, up to and including Review 6.16, have featured various silencers on several host weapons. Eight of those reviews feature centerfire rifle silencers; two of which were tested in two configurations each due to modularity of the silencer body or end-cap. This is a comparative summary of the objective performance of those ten total configurations.

This Results Summary is part of ongoing PEW Science small arm weapon system sound signature research.

The data herein references the Suppression Rating and relative back pressure metrics which have been reported throughout the centerfire rifle reviews, to date, in order to frame objective flow rate characteristics of the silencers for their prospective use on semi- and fully-automatic small arms. This data is the first of its kind in the public domain and represents a direct contribution of PEW Science member-funded research to the state of practice.

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SSS.6.17 - Research Supplement: Razor, Sandman-S, Trash Panda, and Radiant Further Analysis

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SSS.6.17 - Research Supplement: Razor, Sandman-S, Trash Panda, and Radiant Further Analysis

The previous Sound Signature Reviews of the Rugged Razor (6.16), Dead Air Sandman-S (6.11), Q Trash Panda (6.4), and Rugged Radiant (6.12) presented typical sound signatures of the silencers on a .308 bolt-action rifle with an 20-inch barrel.

This members-only research supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations in the aforementioned reviews and to help frame objective loudness comparisons between the four silencers. This supplement is part of ongoing PEW Science small arm weapon system sound signature research.

The four silencers in this comparative analysis were included based upon their similar or overlapping categories of physical characteristics and performance parameters, such as length, weight, suppression, and back pressure.

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SSS.6.14 - Research Supplement: Radiant, Omega 300, and Sandman-S Further Analysis

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SSS.6.14 - Research Supplement: Radiant, Omega 300, and Sandman-S Further Analysis

The previous Sound Signature Reviews of the Rugged Radiant (6.12), SilencerCo Omega 300 (6.10), and Dead Air Sandman-S (6.11) presented typical sound signatures of the silencers on a .308 bolt-action rifle with an 20-inch barrel. In PEW Science testing, the Radiant achieved a Suppression Rating of 32.9 in its long configuration. The Omega 300 achieved a rating of 38.3. The Sandman-S achieved a rating of 32.6.

This members-only research supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations in the aforementioned reviews and to help frame objective loudness comparisons between the three silencers. This supplement is part of ongoing PEW Science small arm weapon system sound signature research.

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SSS.6.9 - Research Supplement: MOD9 FS, Obsidian 45, and Trident-9 Further Analysis

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SSS.6.9 - Research Supplement: MOD9 FS, Obsidian 45, and Trident-9 Further Analysis

The previous Sound Signature Reviews of the CGS MOD9 FS (6.6), Rugged Obsidian 45 (6.7), and SWR Trident-9 (6.8) presented typical sound signatures of the silencers on a full-size 9mm semiautomatic combat handgun.

This members-only research supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations in the aforementioned reviews and to help frame objective loudness comparisons between the three silencers; both in first round pop (FRP) and average sound signature. This supplement is part of ongoing PEW Science small arm weapon system sound signature research.

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SSS.6.5 - Research Supplement: Trash Panda and VOX S Further Analysis

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SSS.6.5 - Research Supplement: Trash Panda and VOX S Further Analysis

The previous Sound Signature Reviews of the VOX S (6.3) and the Q Trash Panda (6.4) presented typical sound signatures of the silencers on typical hunting rifle configurations.

This members-only review supplement is intended to provide more information to PEW Science members with regard to specific sound signature characteristics of the tested configurations in the aforementioned reviews and to help frame objective loudness comparisons between the two silencers. This supplement is part of ongoing PEW Science small arm weapon system sound signature research.

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