SSS.6.211 - Dillon Rifle Company DRC308 and the KAC SR-25 7.62x51mm 14.5-in Barrel Automatic AR-10 Rifle

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SSS.6.211 - Dillon Rifle Company DRC308 and the KAC SR-25 7.62x51mm 14.5-in Barrel Automatic AR-10 Rifle

The Dillon DRC308 is a midsize 7.62mm rifle silencer with competitive muzzle suppression performance for its size, optimized for automatic (reciprocating) rifle use. Constructed entirely of 3D-printed Inconel alloy, the silencer also offers the requisite durability for heavy firing schedules. The DRC308 is HUB-mountable and produces gross free field muzzle blast suppression on supersonic rifle platforms on par with some longer silencers; with the tested direct-thread mount, the silencer is only 6.84-in long. This performance, for form factor, is postulated to be significant. The back pressure induced by the DRC308 is not significantly high.

In this review, the Dillon DRC5308 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short barrel gas-operated 7.62 NATO rifle, which is an incredibly difficult task. How would the Dillon DRC308 perform on your 14.5-in barrel battle rifle?

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SSS.6.210- Research Supplement: Unsuppressed Rifles; the 14.5-in KAC SR-25 as a Silencer Test Host (Public Article)

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SSS.6.210- Research Supplement: Unsuppressed Rifles; the 14.5-in KAC SR-25 as a Silencer Test Host (Public Article)

Bolt-action weapons allow for the elimination of variables to study pure sound signature suppression phenomena. Other than sound transmission through the weapon system itself, there is one primary source of overpressure to atmosphere. Reciprocating (automatic) weapons introduce additional sources of overpressure to atmosphere, namely from their breach during function, which is necessary for ejection. Since the introduction of automatic rifle signatures into the Standard in Public Research Supplement 6.51and Public Research Supplement 6.127, and automatic subgun signatures in Public Research Supplement 6.85, additional weapon system variables have been introduced that influence the blast overpressure and sound fields, as mapped by the measured muzzle and at-ear signatures. These fields continue to be incorporated into the database of suppressed small arm weapon system performance, summarized in Section 7 of the Standard.  Hazard Map Briefs are now presented in Section 8 of the Standard to give users a visual spatial depiction of small arm personnel hazards. The purpose of this Public Research Supplement is to present a first-look at muzzle blast phenomenology for a new addition to the published host weapon systems in the Standard; the 14.5-in KAC SR-25 CC automatic rifle chambered in 7.62x51mm NATO.

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SSS.6.209 - Stealth Additive Works Tisha and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

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SSS.6.209 - Stealth Additive Works Tisha and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

The Stealth Additive Works Tisha is a compact titanium 5.56 rifle silencer with extreme suppression performance and balanced flow rate.  The silencer uses next generation technology, is only 4.1 inches long without a mount, and is HUB-mount compatible.  The Tisha is not only lightweight and smaller than most rifle silencers on the market, but it also outperforms all 5.56 suppression systems evaluated by the PEW Science Laboratory, as of the date of this report publication.  Its performance is unprecedented, regardless of size, and it lives up to its namesake.

In this review, the Stealth Additive Works Tisha performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short-barrel gas-operated rifle, which is an incredibly difficult task. How would the Stealth Additive Works Tisha perform on your MK18 with a 10.3-in barrel?

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SSS.6.208 - SilencerCo Sparrow and the Beretta 21A

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SSS.6.208 - SilencerCo Sparrow and the Beretta 21A

The SilencerCo Sparrow is a full-size rimfire silencer that exhibits relatively competitive performance, on average, to modern designs.  However, its first-round-pop (FRP) suppression performance on short barrel weapons is significantly lacking.  A key feature of the Sparrow is its ease of disassembly for user maintenance.  Debuted as SilencerCo’s first product almost two decades ago, the Sparrow possesses internal clam shells that isolate the outer tube from the monolithic baffle core. The silencer is rated for most rimfire cartridges as well as 5.7x28mm, and has enjoyed significant proliferation throughout the market.

How would the SilencerCo Sparrow perform on your .22 semiautomatic pistol?

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SSS.6.207 - Battle Born Supply Co. Whiskey Quebec 5.56 Purged and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

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SSS.6.207 - Battle Born Supply Co. Whiskey Quebec 5.56 Purged and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

The Battle Born Supply Co. Whiskey Quebec 5.56 is a full size Inconel rifle silencer intended for hard use. Its relatively complex hybrid design does produce higher flow rate than several other competing models. This performance trait reduces operator hazard on some weapon systems. Note that the Whiskey Quebec is also available as a Purged model, which possesses higher late time flow rate, further reducing system back pressure and increasing operator protection. The silencer uses its included Flor De La Muerte mount, which is a combined flash hider and muzzle brake threaded 1/2-28tpi.

In this review, the Battle Born Supply Co. Whiskey Quebec 5.56 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle, which is an incredibly difficult task. How would the Battle Born Supply Co. Whiskey Quebec 5.56 perform on your M4 with a 14.5-in barrel?

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SSS.6.206 - Battle Born Supply Co. Whiskey Quebec 5.56 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

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SSS.6.206 - Battle Born Supply Co. Whiskey Quebec 5.56 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

The Battle Born Supply Co. Whiskey Quebec 5.56 is a full size Inconel rifle silencer intended for hard use. Its relatively complex hybrid design does produce higher flow rate than several other competing models. This performance trait reduces operator hazard on some weapon systems. Note that the Whiskey Quebec is also available as a Purged model, which possesses higher late time flow rate, further reducing system back pressure and increasing operator protection. The silencer uses its included Flor De La Muerte mount, which is a combined flash hider and muzzle brake threaded 1/2-28tpi.

In this review, the Battle Born Supply Co. Whiskey Quebec 5.56 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle, which is an incredibly difficult task. How would the Battle Born Supply Co. Whiskey Quebec 5.56 perform on your M4 with a 14.5-in barrel?

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SSS.6.205 - Combat Application Technologies CAT/BEN and the Beretta 21A

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SSS.6.205 - Combat Application Technologies CAT/BEN and the Beretta 21A

The Combat Application Technologies CAT/BEN is a subcompact “micro” rimfire silencer that exhibits enhanced performance characteristics for its size, including on short-barrel semiautomatic pistols with subsonic ammunition.  It is rated for 5.7x28mm, and is only 4.28 inches long.  At the time of evaluation, there have been no other rimfire silencers in the public research pedigree that exhibit the performance of the CAT BEN in the same length envelope in this combustion regime.  The silencer is sealed; its monolithic DMLS titanium body may be cleaned with a variety of chemical solutions.

How would the CAT BEN perform on your .22 semiautomatic pistol?

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SSS.6.204 - Otter Creek Labs Infinity and 7.62x39mm Automatic AK-Pattern Rifles

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SSS.6.204 - Otter Creek Labs Infinity and 7.62x39mm Automatic AK-Pattern Rifles

The Otter Creek Labs Infinity is a severe-use mid-size 30 caliber rifle silencer with an advanced but flexible hybrid design. In the role of a 7.62x39mm AK-pattern rifle silencer, it is considered full-size. The silencer is user-configurable for different blast load flow states and allows the operator to adapt the system to a variety of host weapons. With a high early-time flow rate, the silencer is well suited to reduce system back pressure. When utilizing its vented 7.62 end cap that increases late-time flow rate significantly, the Infinity performs well on standard untuned AK rifles and produces balanced and efficient performance, regardless of barrel length. The Infinity is 3D-printed from Inconel alloy and is expected to offer significant durability for hard use.

In this review, the Otter Creek Labs Infinity performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on two AK-pattern gas-operated rifles, which is an incredibly difficult task. How would the Otter Creek Labs Infinity perform on your Bulgarian AK-pattern rifle with a 16.3-in or 12.6-in barrel?

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SSS.6.203 - Combat Application Technologies CAT/CACM 556 and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

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SSS.6.203 - Combat Application Technologies CAT/CACM 556 and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

The Combat Application Technologies CACM 556 is a standard size 5.56 rifle silencer intended for high pressure applications. The combination of suppression performance and back pressure reduction of the CAT CACM 556 is currently unprecedented in the research. At a total length of 6.1-in with its included mount, the silencer provides hazard reduction that exceeds that of a significant amount of models on the current market, and even models that are significantly larger. The CACM implementation of SURGE BYPASS technology in the silencer demonstrates the further industry advancement in hybrid designs that continues to eclipse the performance of legacy systems. Though the silencer is intended for use on the dedicated CAT CACM 556 rifle platform, silencers using the CACM technology are slated to be available from the NANO muzzle device developer, Apparition Instruments, with model designation 5CM.

In this review, the CAT CACM 556 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short-barrel gas-operated rifle, which is an incredibly difficult task. How would the CAT CACM 556 or AI 5CM perform on your MK18 with a 10.3-in barrel?

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SSS.6.202 - Zastava ZVUK and the 7.62x39mm Automatic Serbian AK-Pattern Rifle

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SSS.6.202 - Zastava ZVUK and the 7.62x39mm Automatic Serbian AK-Pattern Rifle

The Zastava ZVUK is a 3D printed modern tribute to the Soviet Pribor Besshumnoy Stryelbiy (PBS) silencer system. Unlike the original PBS silencer designs, the ZVUK uses modern technology with a monolithic printed design possessing stepped baffles combined with Purposely Induced Porosity (PIP) under license, along with early blast chamber venting and secondary flow paths. These design differences result in significant pure suppression performance from the ZVUK and a higher gross flow rate than legacy systems.

In this review, the Zastava Arms ZVUK performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on an AK-pattern gas-operated rifle, which is an incredibly difficult task. How would the Zastava Arms ZVUK perform on your AK-pattern rifle with a 16.3-in barrel?

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SSS.6.201 - Dead Air Wolverine and 7.62x39mm Automatic AK-Pattern Rifles

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SSS.6.201 - Dead Air Wolverine and 7.62x39mm Automatic AK-Pattern Rifles

The Dead Air Wolverine is a modern tribute to the Soviet Pribor Besshumnoy Stryelbiy (PBS) silencer system and is intended to suppress weapons of Soviet origin, such as several AK-pattern rifle variants with semiautomatic and automatic fire.  Unlike the original PBS silencer design(s) the Wolverine uses modern baffle technology, materials, and construction.  However, when compared to the current state of the art, the Wolverine’s internal design is relatively conventional.  The signature suppression performance of the Wolverine, and its personnel hazard reduction, is relatively low when compared to many modern rifle silencers.

In this review, the Dead Air Wolverine performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on three AK-pattern gas-operated rifles, which is an incredibly difficult task. How would the Dead Air Wolverine perform on your Bulgarian or Yugoslavian AK-pattern rifle with a 16.3-in or 12.6-in barrel?

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SSS.6.200- Research Supplement: Unsuppressed 7.62×39mm AK-Pattern Rifles as Silencer Test Hosts (Public Article)

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SSS.6.200- Research Supplement: Unsuppressed 7.62×39mm AK-Pattern Rifles as Silencer Test Hosts (Public Article)

Bolt-action weapons allow for the elimination of variables to study pure sound signature suppression phenomena. PEW Science is continuing bolt-action weapon testing, analysis, and research. Automatic weapons introduce additional sources of overpressure to atmosphere, namely from their breach during function, which is necessary for ejection. Since the introduction of automatic rifle signatures into the Standard in Public Research Supplement 6.51, and automatic subgun signatures in Public Research Supplement 6.85, additional weapon system variables have been introduced that influence the sound fields, as mapped by the measured muzzle and at-ear signatures. PEW Science is continuing the aforementioned bolt-action and automatic rifle weapon testing, analysis, and research. The purpose of this Public Research Supplement is to present a first-look at muzzle blast phenomenology for a new addition to the published host weapon systems in the Standard; AK-pattern rifles chambered in 7.62×39mm.

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SSS.6.199 - Wolfpack Armory Disruptor 556 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

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SSS.6.199 - Wolfpack Armory Disruptor 556 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

The Wolfpack Armory Disruptor 556 is a full size and somewhat lightweight dedicated 5.56mm rifle silencer with HUB-mountable adaptability. With higher backpressure than many designs, weapon system tuning is highly recommended for the best user experience with this conventional baffle system. The silencer is fully welded, tubeless heat treated stainless steel, and is expected to be durable enough for most reasonable firing schedules. The end cap of the Disruptor 556 is removable for both repair and replacement.

In this review, the Wolfpack Armory Disruptor 556 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle, which is an incredibly difficult task. How would the Wolfpack Armory Disruptor 556 perform on your M4 with a 14.5-in barrel?

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SSS.6.198 - Microtech Defense R2K9 and the HK P30L

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SSS.6.198 - Microtech Defense R2K9 and the HK P30L

The Microtech Defense R2K9 is a high performance modular centerfire pistol silencer with lengths in each configuration that are somewhat longer than typical. These lengths allow for interesting performance potentials, given that the silencer uses optimized legacy K-baffle technology. In the short configuration, the silencer is shorter than most full size pistol silencers but achieves performance higher than many “short configurations.” Users may find this balance of size and performance attractive. The R2K9 is user-serviceable and the retail package includes a plethora of accessory and maintenance components not typically found with competing models. Released to the market in the year 2020 timeframe, the Microtech R2K9 still brings competitive performance five years later, in a relatively lightweight envelope.

In this review, the Microtech Defense R2K9 performance metrics depend upon suppressing a full-size handgun firing a full-power subsonic centerfire pistol cartridge. How would the Microtech Defense R2K9 silencer perform on your self-defense handgun, in both long and short configurations?

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SSS.6.197 - Combat Application Technologies CAT/KK and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

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SSS.6.197 - Combat Application Technologies CAT/KK and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

The Combat Application Technologies Kitty Kat (CAT KK) is a compact centerfire 6mm rifle silencer intended for high pressure applications on short barrels. The combination of suppression performance and back pressure reduction of the CAT KK is unprecedented for its size. At a total length of 4.75-in with its included mount, the silencer provides hazard reduction that meets or exceeds that of a significant amount of models on the current market, in a very competitive form factor. The length-truncated implementation of SURGE BYPASS technology in the silencer demonstrates the further industry advancement in hybrid designs that continue to eclipse the performance of legacy systems.

In this review, the CAT KK performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short-barrel gas-operated rifle, which is an incredibly difficult task. How would the CAT KK perform on your MK18 with a 10.3-in barrel?

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SSS.6.196 - Otter Creek Labs Infinity and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

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SSS.6.196 - Otter Creek Labs Infinity and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

The Otter Creek Labs Infinity is a severe-use mid-size 30 caliber rifle silencer with an advanced but flexible hybrid design.  In the role of a 5.56 rifle silencer, it is considered full-size.  The silencer is user-configurable for different blast load flow states and allows the operator to adapt the system to a variety of host weapons.  With a high early-time flow rate, the silencer may perform well on semiautomatic platforms even in its most restrictive configuration.  For sensitive platforms, the user may fully vent blast loads from multiple stages of the silencer, lowering back pressure to a minimum for this design.  The Infinity is 3D-printed from Inconel alloy and is expected to offer significant durability for hard use.

In this review, the Otter Creek Labs Infinity performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle, which is an incredibly difficult task. How would the Otter Creek Labs Infinity perform on your MK18 with a 10.3-in barrel, with three of its different end caps?

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SSS.6.195 - FOR Systems Monarch Recce and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

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SSS.6.195 - FOR Systems Monarch Recce and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

The FOR Systems Monarch Recce is a compact high performance 5.56mm rifle silencer that is available in both 3D printed Inconel and titanium alloys. With extremely competitive gross signature suppression for its size, and a higher flow rate than typical for the type of performance it offers, the Monarch Recce represents a significant advancement in compact centerfire rifle suppression for the 10.3-in MK18 short barrel rifle. The silencer is HUB mount capable; the tested configuration is 5.13 inches long.

In this review, the FOR Systems Monarch Recce performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short-barrel gas-operated rifle, which is an incredibly difficult task. How would the FOR Systems Monarch Recce perform on your MK18 with a 10.3-in barrel?

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SSS.6.194 - Dillon Rifle Company DRC556 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

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SSS.6.194 - Dillon Rifle Company DRC556 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

The Dillon DRC556 is a somewhat compact dedicated 5.56mm rifle silencer with extreme muzzle suppression performance for its size. Constructed entirely of 3D-printed Inconel alloy, the silencer also offers the requisite durability for heavy firing schedules. The DRC556 is HUB-mountable and produces gross free field muzzle blast suppression on supersonic rifle platforms on par with that of much larger silencers; with its included direct thread mount, the silencer is only 5.75-in long. This performance, for form factor, is extremely significant. The back pressure induced by the DRC556 is not significantly high, though it is somewhat higher than some competing models in this performance class.

In this review, the Dillon DRC556 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle, which is an incredibly difficult task. How would the Dillon DRC556 perform on your M4 with a 14.5-in barrel?

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SSS.6.193 - Combat Application Technologies CAT/TSWIF and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

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SSS.6.193 - Combat Application Technologies CAT/TSWIF and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle

The CAT TSWIF is a high performance low back pressure micro silencer intended to be used with pinned-and-welded blast diverter muzzle devices on 5.56 AR-15 weapon systems. Adding only 2.6 inches to the system length, the TSWIF provides consistent signature reduction expediently and in a compact package. The CAT TSWIF system is available in thread patterns compatible with blast diverters from Apparition Instruments, Noveske Rifleworks, and others. When compared to other compact silencers fielded on the typical 14.5-in M4 rifle, the CAT TSWIF provides competitive performance and allows blast diverter users to maintain BATFE non-SBR compliance as required.

In this review, the CAT TSWIF performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a commonly fielded gas-operated rifle outfitted with a blast diverter, which is an incredibly difficult task. How would the CAT TSWIF perform on your M4 with a 14.5-in barrel and pinned-and-welded blast diverter or flash suppressor?

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SSS.6.192 - Engaged Industries Operator 5.56 and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

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SSS.6.192 - Engaged Industries Operator 5.56 and the MK18 5.56x45mm Short Barrel Automatic AR15 Rifle

The Engaged Industries Operator 5.56 is a full length reduced diameter 5.56mm rifle silencer possessing a secondary retention mounting system that is simple to operate.  The silencer also has lower back pressure than several competing models; the suppression performance of the silencer is relatively balanced, especially for its size and weight. Notable aspects of the silencer’s performance include its consistent signature and only moderate first-round-pop.  At 1.5-in diameter, and less than 16 ounces including its mount system, the Operator 5.56 performance is relatively competitive in the broad 5.56 silencer market.

In this review, the Engaged Industries Operator 5.56 performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on a short-barrel gas-operated rifle, which is an incredibly difficult task. How would the Engaged Industries Operator 5.56 perform on your MK18 with a 10.3-in barrel?

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