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

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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 (Free Version)

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. The vented end cap configurations of the Infinity produce performance that scales well with increasing barrel lengths.

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 with three of its different end caps perform on your M4 with a 14.5-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 (Free Version)

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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 (Free Version)

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 (Free Version)

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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 (Free Version)

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.6.187 - Sylvan Arms SA223TIS and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.187 - Sylvan Arms SA223TIS and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The Sylvan Arms SA223TIS is a mid-size 5.56 rifle silencer that possesses a robust mounting system and a lighter weight than some competing designs. Its conventional baffle technology provides suppression performance that competes with models using similar technologies, as expected, and exceeds the performance of some designs. For use on short barrel rifles, the titanium-tube clad SA223TIS possesses a stainless steel blast chamber and baffles, adding some resiliency. The included taper mount with ratcheting retention securely seals; a direct-thread version of the silencer is also available.

In this review, the Sylvan Arms SA223TIS 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 Sylvan Arms SA223TIS perform on your M4 with a 14.5-in barrel?

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SSS.6.183 - BOE Mod 1 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.183 - BOE Mod 1 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The BOE Mod 1 is a full size multi-core rifle silencer. With its 5.56 core and solid end cap, the Mod 1 exhibits significant overall signature suppression performance, and its back pressure may be reduced with the use of a vented end cap. The outer tube of the BOE Mod 1 system is titanium, and the user may choose silencer cores of both different caliber and different material (Inconel or titanium). The 3D-printed cores are "swappable” by the user, from the manufacturer. Material choice, end cap choice, and core bore size choice will dictate user experience in blast overpressure suppression, depending on weapon system selection. The silencer’s core geometry provides a significant amount of surface area, which is one of factors producing its high muzzle suppression performance.

In this review, the BOE Mod 1 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 BOE Mod 1 perform on your M4 with a 14.5-in barrel?

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SSS.6.181 - Echo Zulu Defense X1R556-Ti and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.181 - Echo Zulu Defense X1R556-Ti and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The Echo Zulu Defense X1R556-Ti is a full size and lightweight 5.56mm rifle silencer that exhibits significant overall signature suppression performance with moderate back pressure reduction. Constructed entirely of 3D-printed titanium alloy, the HUB-mountable X1R556-Ti weighs only 11.1 ounces without a mount, which can enhance the ease of weapon handling. While the FRP control of the silencer is somewhat lacking, the overall signature reduction is high. The multi-stage hybrid ReFlow Technology in the silencer does show efficacy for reducing back pressure without compromising suppression performance, and is particularly well-suited to bolt-action rifle use.

In this review, the Echo Zulu Defense X1R556-Ti 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 Echo Zulu Defense X1R556-Ti perform on your M4 with a 14.5-in barrel?

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SSS.6.176 - PTR VENT Spiritus 556i and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.176 - PTR VENT Spiritus 556i and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The PTR VENT Spiritus 556i is a full size 5.56mm machine gun rated rifle silencer that exhibits highly advanced signature suppression performance and back pressure reduction.  Constructed entirely of 3D-printed Inconel alloy, the HUB-mountable VENT Spiritus 556i also exhibits some of the most significant operator hazard reduction on the standard short-barrel MK18 weapon system of any silencer evaluated by PEW Science to date.  When used on the popular 14.5-in barrel M4A1RIII mid-gas rifle, its muzzle suppression performance is class-leading.  In combination with minimal FRP and strong distal blast momentum control, the Purposely Induced Porosity (PIP) technology in the silencer allows for high performance in a variety of environments with notable potential to continue to advance performance thresholds in the suppressed small arms state of practice.

In this review, the PTR VENT Spiritus 556i 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 PTR VENT Spiritus 556i perform on your M4 with a 14.5-in barrel?

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SSS.6.168 - HUXWRX FLOW 556 Ti and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.168 - HUXWRX FLOW 556 Ti and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The HUXWRX FLOW 556 Ti is a lightweight full size 5.56 mm rifle silencer with significant back pressure reduction, without compromise of gross sound suppression performance. Optimized for the 5.56 mm cartridge, the FLOW 556 Ti improves upon the performance of the FLOW 762 Ti on AR15 weapon systems in both bystander and operator hazard reduction. At less than 14 ounces of system weight, its performance and maneuverability are significantly notable. Acute blast overpressure hazards from the ejection port of standard AR15 systems are significantly reduced through the use of this silencer. The silencer is constructed of 3D-printed Grade 5 Titanium. The Flow-Through technology implemented in the FLOW series from HUXWRX continues to represent one of the most advanced systems evaluated by PEW Science, to date.

In this review, the HUXWRX FLOW 556 Ti 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 HUXWRX FLOW 556 Ti perform on your M4 with a 14.5-in barrel?

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SSS.6.156 - KAC 556 QDC/CRS-PRT and 556 QDC/MCQ-PRT System Optimization: SR-15 Carbine MOD 2, CQB MOD 2, M4A1RIII, and MK18 5.56x45mm Short Barrel Automatic AR15 Rifles (Free Version)

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SSS.6.156 - KAC 556 QDC/CRS-PRT and 556 QDC/MCQ-PRT System Optimization: SR-15 Carbine MOD 2, CQB MOD 2, M4A1RIII, and MK18 5.56x45mm Short Barrel Automatic AR15 Rifles (Free Version)

The KAC 556 PRT silencers are an evolution of the legacy Inconel QDSS-NT4 design. The 556 QDC/CRS-PRT and QDC/MCQ-PRT represent the latest iteration of 5.56mm rifle silencers from KAC exhibiting high flow rate throughout the entire time regime. The silencers are DMLS manufactured and mount to host weapon systems using the KAC Quick Detach system; a simple and secure technology. The PRT series maintains much of the signature suppression performance of legacy KAC QDC and NT4 designs, while offering reduced operator hazard potential. This comprehensive research program examines the performance of both 556 PRT silencers mounted with multiple muzzle devices across multiple weapon systems.

In this study, the KAC QDC/CRS-PRT and QDC/MCQ-PRT performance metrics depend upon suppressing a supersonic centerfire rifle cartridge on several commonly fielded gas-operated rifle platforms with multiple muzzle devices, which is an incredibly difficult task. How would the KAC QDC/CRS-PRT and QDC/MCQ-PRT perform on your SR-15 or AR-15 with 3-Prong and MAMS mounts, and what tradeoffs are there, if any?

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SSS.6.144 - Surefire SOCOM556-MINI2 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.144 - Surefire SOCOM556-MINI2 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The Surefire SOCOM556-MINI2 is a compact 5.56mm rifle silencer that possesses competitive sound signature suppression performance for its size, while possessing reduced back pressure compared to some designs. Users should note that the MINI2 is only 5 inches long and its suppression performance does not reach the levels of some larger designs. The SOCOM556-MINI2 is intended for use on 5.56x45mm weapons with barrels 14.5-in and longer.

In this review, the Surefire SOCOM556-MINI2 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 Surefire SOCOM556-MINI2 perform on your M4 with a 14.5-in barrel with both the 3-Prong and WARCOMP mounts?

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SSS.6.130 - Combat Applications Technologies CAT/WB/A1/718 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.130 - Combat Applications Technologies CAT/WB/A1/718 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The CAT/WB/A1/718 (CAT WB) is a compact and extremely advanced 5.56mm machine gun rated rifle silencer that exhibits significant back pressure reduction and sound signature suppression performance, for its size. Its sound suppression performance on both medium and short barrel 5.56x45mm rifles is significant. Notably, the CAT SURGE BYPASS technology in the silencer appears to balance high flow rate behavior with superior overall signature suppression. The silencer is available in two 3D-printed material options; proprietary Inconel alloy and Titanium. The weights of both models are notable. The CAT WB represents one of the most advanced systems evaluated by PEW Science, to date.

In this review, the CAT WB 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 CAT WB perform on your M4 with a 14.5-in barrel?

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SSS.6.128 - Surefire SOCOM556-RC2 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

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SSS.6.128 - Surefire SOCOM556-RC2 and the M4A1 Mid-Gas 5.56x45mm 14.5-in Barrel Automatic AR15 Rifle (Free Version)

The Surefire SOCOM556-RC2 is a full-size 5.56mm machine gun rated rifle silencer that possesses competitive sound signature suppression performance with many silencers on the market, while possessing reduced back pressure compared to some designs. Users should note that full-size 5.56mm rifle silencers are often smaller than their full-size 7.62mm (.30) counterparts. The SOCOM556-RC2 was designed for the 10.3-in MK18 weapon system.

In this review, the Surefire SOCOM556-RC2 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 Surefire SOCOM556-RC2 perform on your M4 with a 14.5-in barrel?

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SSS.6.127- Research Supplement: Unsuppressed Rifles; the 14.5-in M4A1 Mid-Gas as a Silencer Test Host (Public Article)

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SSS.6.127- Research Supplement: Unsuppressed Rifles; the 14.5-in M4A1 Mid-Gas as a Silencer Test Host (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. 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 M4A1 Mid-Gas automatic rifle chambered in 5.56x45mm NATO.

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