Today’s Topics: 1. Sound Signature Review 6.209 – Stealth Additive Works Tisha on the 10.3-in 5.56 MK18. What happens when high level engineering combines all the hybrid design principles we’ve been discussing on this podcast for years into a compact silencer design, and additive manufacturing makes it possible to produce? You get things like this. The incredible joy it brings us to show you things like this are possible is the best Christmas gift we could ask for. Let’s introduce today’s publication, at a high level.  Also, Silencer Hazard Map Brief 8.1.7. a. Intro to the intro (00:08:20) b. Basic Tisha high level overview (00:15:12) c. Industry implications (00:35:28) 2. YouTube. Otherwise known as “the controller of all videos on the internet.” Don’t kid yourself; if you are uploading things to YouTube, they control you to the extent you let them. On a positive note, let’s discuss why that’s OK, as long as you understand the implications. (00:51:15)

Today’s Topics: 1. Sound Signature Review 6.208 – SilencerCo Sparrow on the subcompact Beretta 21A Bobcat. Historically significant silencer, by popular demand. Long overdue. The Sparrow was SilencerCo’s first product and has enjoyed significant proliferation. Let’s dive into this FRP-famous silencer, technically. This accompanies last week’s report and Silencer Hazard Map Brief 8.1.6. a. Introduction (00:07:35) b. Sparrow Design (00:13:14) c. Sparrow performance (00:21:08) d. Spatial hazards (00:43:38) e. Final thoughts (00:46:57) 2. The 300 BLK MCX, or Rattler LT, or LVAW, or whatever you want to call it… is really fun! Like any cool small arm weapon system, you want to make it “your own.” I am busy doing that. Wanted to share some thoughts about my own personal gun and what I have discovered I like, don’t like, and how it’s working for me. (00:48:59)

Today’s Topics: 1. Sound Signature Review 6.208 – SilencerCo Sparrow on the subcompact Beretta 21A Bobcat. Historically significant silencer, by popular demand. Long overdue. The Sparrow was SilencerCo’s first product and has enjoyed significant proliferation. Most folks know about its first-round-pop (FRP) on short barrels. Do you? Check it out in this introduction to today’s report! (00:07:13) 2. Silencer Hazard Map Brief 8.1.6 – SilencerCo Sparrow on the Beretta 21A Bobcat. This brief accompanies today’s report. The Silencer Hazard Map is animated! This allows you to visualize first round pop, which is one of the SilencerCo Sparrow’s pitfalls. Is the hazard field severity surprising to you? Have you ever shot a Sparrow? Many of you have! (00:22:52)

Today’s Topics: 1. Sound Signature Review 6.206 – Battle Born Supply Co. Whiskey Quebec 5.56 on the 14.5-in mid-length gas M4. The Purged version was evaluated in Report 6.207. This is the technical discussion accompanying those two analytical test reports, exploring the performance efficacy of Triply Periodic Minimal Surface (TPMS) baffle structures. a. Intro and recap (00:06:56) b. Basic TPMS geometry and applications to silencers, pros and cons (00:17:20) c. Overall technical observations (00:29:25) d. Conclusions (00:47:24) 2. Silencer Hazard Map Brief 8.1.5 – SilencerCo Saker 556 vs. the HUXWRX FLOW 556k on the MK18. Due to popular request to showcase a high backpressure conventional 5.56 silencer, we went back into the archives, all the way to Report 6.53 from 2021 and ran the test results through the PEW-SOFT HD Hazard Mapper. Does this Silencer Hazard Map for the Saker 556 help illustrate operator risk when using these types of legacy silencer designs? Can a HUXWRX FLOW 556k save you? Maybe not. (00:50:17)

Today’s Topics: 1. Sound Signature Review 6.206 – Battle Born Supply Co. Whiskey Quebec 5.56 on the 14.5-in mid-length gas M4. Inconel. 3D printed. Are there folks out here using 3D printing for things that are simply not machinable by traditional methods? Yes. This family of silencers is one of them. Let’s explore the performance of Triply Periodic Minimal Surface (TPMS) baffle structures in the intro to this report published with today’s episode. (00:08:06) 2. Sound Signature Review 6.207 – Battle Born Supply Co. Whiskey Quebec 5.56 Purged on the 14.5-in mid-length gas M4. This is the high(er) flow rate brother to the silencer we just discussed. Both silencers have high early-time flow rate. What if you increase the late time flow rate? Let’s check out the performance differentials in the intro to the second report published today. (00:27:16) 3. Silencer Hazard Map Brief 8.1.4 – Analytical test reports too long for you? Maybe you don’t have time to dig into them yet before you eat turkey and pumpkin pie? Not a problem. Hit this Brief for a succinct look at how the Whiskey Quebec 5.56 (Purged and non-Purged models) project hazards to personnel, spatially. Pictures are good! (00:34:15)

Today’s Topics: 1. Sound Signature Review 6.205 – Combat Application Technologies CAT BEN micro silencer on the subcompact Beretta 21A. Rimfire is back. Compact? Yes. Everyone wants to put small silencers on subcompact hosts. Sometimes that can be pretty loud. Does the BEN offer relief? Technical discussion for this report and PEW-SOFT HD Hazard Map published last week. a. Introduction (00:06:42) b. Silencer Hazard Map Brief 8.1.2 (00:14:36) c. Technical performance (00:19:10) d. Final thoughts (00:41:18) 2. Silencer Hazard Map Brief 8.1.3 – Unsuppressed MK18 in the free field. There has been a lot of talk about blast overpressure, human risk, and traumatic brain injury (TBI). This deliverable should help folks get more familiar with blast loads, understand blast overpressure in familiar terms, and help silencer folks become more familiar with traditional blast overpressure hazard and human risk vernacular. (00:46:09)

Today’s Topics: 1. Sound Signature Review 6.204 – Otter Creek Labs Infinity on 16.3-in and 12.6-in AK systems. The Infinity it one of the most characterized silencers by the PEW Science Laboratory. With the addition of these two tests, it brings the total amount of Infinity record numbers in the Rankings to 11. In this test program, the vented 7.62 end cap was used, exclusively. Technical discussion of this report that was published 22-OCT. a. Intro and broad performance overview (00:07:43) b. 16.3-in system performance (00:21:40) c. 12.6-in system performance (00:32:07) d. Overall thoughts (00:38:35) 2. Sound Signature Review 6.205 – Combat Application Technologies CAT BEN micro silencer on the subcompact Beretta 21A. Rimfire is back. Compact? Yes. Everyone wants to put small silencers on subcompact hosts. Sometimes that can be pretty loud. Does the BEN offer relief? Check out today’s report along with a bonus PEW-SOFT HD Hazard Map! Intro talk. (00:46:58)

Today’s Topics: 1. Today we are launching Section 8 of the Silencer Sound Standard: SSS.8 – Advanced Silencer Research. Outside of public view, PEW Science performs a significant amount of testing and engineering analysis on a variety of systems; most of which is never published. Not everything has to remain behind closed doors. Section 8 of the Standard presents further research advancements that are cleared for public release. (00:04:02) 2. The first section in Section 8 is live today with this episode! The first report in this section is SSS.8.1.1 - Introducing PEW-SOFT HD Hazard Maps. The Suppression Rating has made you powerful. Now, you will become even more powerful, as you navigate personnel hazards from silencers in both the free field and near reflecting surfaces; everywhere. We’ll walk you through the report in today’s talk. Here is an outline: a. Introduction (00:08:22) b. 8.1.1.1 - Dimensional Variations (00:20:12) c. 8.1.1.2 - Free Field Data, and You (00:22:55) d. 8.1.1.3 - PEW-SOFT HD Hazard Mapper (00:31:19) e. 8.1.1.4 - MK18 Case Study: 556-RC2 vs. 556-RC3 vs FLOW 556k (00:41:04) f. 8.1.1.5 - Reflections - Moving outside of the Free Field (01:02:20) g. 8.1.1.6 - Conclusions and Acknowledgements (01:07:24)

Today’s Topics: 1. Sound Signature Review 6.204 – Otter Creek Labs Infinity on 16.3-in and 12.6-in AK systems. The Infinity it one of the most characterized silencers by the PEW Science Laboratory. With the addition of these two tests, it brings the total amount of Infinity record numbers in the Rankings to 11. In this test program, the vented 7.62 end cap was used, exclusively. Could AK suppression be the Infinity sweet spot? This is an introduction to the white paper published today. (00:08:37) 2. Quick note about blast overpressure. There are hundreds of reports at pewscience.com characterizing blast overpressure from suppressed small arms. What is it? Well, you actually already know. (00:25:07)

Today’s Topic: 1. Sound Signature Review 6.203 – Combat Application Technologies CAT CACM 556 on the standard 10.3-in untuned MK18. This is a system-optimized silencer, but PEW Science recommended a standard host platform be used for public evaluation. How does this latest SURGE BYPASS model perform in a 6-inch envelope? Technical discussion for last week’s report. a. Intro (00:07:39) b. Physical overview (00:19:39) c. Silencer Design (00:32:21) d. System Performance (00:47:58)

Today’s Topics: 1. Sound Signature Review 6.202 – Zastava ZVUK on a 16.3-in Yugoslavian AK-pattern system. Another U.S. tribute to the venerable Soviet PBS silencer! You saw the Wolverine performance last time. How does an even more modern PBS homage perform? Does this particular implementation of PIP bring the performance? Technical discussion for last week’s report. (00:09:12) 2. Sound Signature Review 6.203 – Combat Application Technologies CAT CACM 556 on the standard 10.3-in untuned MK18. This is a system-optimized silencer, but PEW Science recommended a standard host platform be used for public evaluation. How does this latest SURGE BYPASS model perform in a 6-inch envelope? The total performance may (or may not) surprise you. The 556 wars rage on; this is an introductory discussion for today’s whitepaper. (00:52:36)

Today’s Topic: 1. Sound Signature Review 6.202 – Zastava ZVUK on a 16.3-in Yugoslavian AK-pattern system. Another U.S. tribute to the venerable Soviet PBS silencer! You saw the Wolverine performance last time. How does an even more modern PBS homage perform? Does this particular implementation of PIP bring the performance? Introduction to today’s whitepaper. a. Intro and aesthetics (00:05:30) b. Technology and performance first look (00:11:41) c. Initial thoughts about the competition and how the AK suppression space will unfold (00:21:30) d. What to expect in this report (00:31:58) Legion Athletics: use code pewscience for BOGO off your entire first order and 20% cash back always! Magpul: Use code PSTEN to receive $10 off your order of $100 or more at Magpul

Today’s Topics: 1. Public Research Supplement 6.200 – Unsuppressed 7.62x39mm AK-Pattern Rifles as Silencer Test Hosts. Zastava ZPAPM70 (16.3-in barrel), Arsenal SAM7R (16.3-in barrel), and Arsenal SAM7C (12.6-in barrel). Technical discussion of this new host platform. (00:06:54) 2. Sound Signature Review 6.201 – Dead Air Wolverine on every AK. How does this U.S. tribute to the venerable Soviet PBS silencer system perform? How does AK action noise manifest? How much does it matter? Can the Wolverine suppress your AK to levels of a modern suppressed AR-15? Technical discussion of last week’s whitepaper. a. Intro (00:26:20) b. Physical overview (00:34:08) c. Silencer Design (00:42:53) d. System Performance (00:45:45)

Today’s Topics: 1. Sound Signature Review 6.199 – Wolfpack Armory Disruptor 556 on the 14.5-in M4. There are a lot of new silencers and new silencer companies entering the space, and we say – the more the merrier. How does this conventionally designed offering stack up in the performance pedigree? This is the combined intro and technical discussion for the report published on 06-SEP. (00:08:23) 2. Public Research Supplement 6.200 – Unsuppressed 7.62x39mm AK-Pattern Rifles as Silencer Test Hosts. Zastava ZPAPM70 (16.3-in barrel), Arsenal SAM7R (16.3-in barrel), and Arsenal SAM7C (12.6-in barrel). In Soviet Russia… silencer suppresses… you? Ha! Let’s take a look at this interesting and historic platform. And… how do we make it quieter?! (00:28:11) 3. Sound Signature Review 6.201 – Dead Air Wolverine on every AK. How does this U.S. tribute to the venerable Soviet PBS silencer system perform? How does AK action noise manifest? How much does it matter? Can the Wolverine suppress your AK to levels of a modern suppressed AR-15? All that, and more, in this intro to today’s multi-test research publication. (00:36:28) 4. SIG MCX Suppressor Compliant Handguard Heat Mitigation. Just a note that the effort has started. Work in progress. Check out the progress here. (00:45:33)

Today’s Topic: 1. Sound Signature Review 6.198 – Microtech Defense R2K9 on the HK P30L. This modular pistol silencers offers lengths that are a bit longer than typical, but produce an interesting performance opportunity for users interested in such a design. How does the optimized k-baffle technology in the R2K9 stack up with current high performers on the market? Technical discussion for the report published last week. (00:06:53) a. Intro (00:08:02) b. Physical overview (00:15:22) c. Silencer Design (00:37:49) d. System Performance (00:46:42)

Today’s Topics: 1. Sound Signature Review 6.198 – Microtech Defense R2K9 on the HK P30L. It’s been about 5 years or so, give or take, since this silencer hit the market. It’s about as old as PEW Science. Was it ahead of its time? Or was it simply a diamond in the rough that folks glossed over? Check out this interesting modular pistol silencer and the fully-featured accessory package in this Member Funded research – intro talk for today’s white paper. (00:08:14) 2. The SIG MCX, or “LVAW” and its variants. 6.75” Rattler LT recreational use continues. Really hammering the system with subs and supers. And, have some ideas for heat mitigation. Let’s continue the discussion we had last week. (00:28:06)

Today’s Topics: 1. Sound Signature Review 6.197 – Combat Application Technologies CAT KK on the 10.3 5.56 MK18. Small silencer with performance that was a little surprising. Hybrid design advanced silencers continue to push the envelope. Technical discussion for the whitepaper published last week. a. Intro and physical characteristics. (00:08:26) b. Design, system performance, and mount considerations. (00:17:11) c. Performance extrapolation. Possible? (00:45:31) 2. The SIG MCX, or “LVAW” and its variants. 6.75” Rattler LT recreational use has been underway. Some interesting findings to share from a recent range outing. Approximately 1000 rounds of various ammo brands, subs and supers, fired from the system with the SIG SD handguard. Practical? Absolutely not, if you shoot a lot. Here are some thoughts. (00:54:08)

Today’s Topics: 1. Sound Signature Review 6.196 – Otter Creek Labs Infinity on the 14.5-in mid-length gas M4A1. You’ve seen this durable, versatile silencer on everything from 7.62 NATO to subsonic 300 BLK to short barrel 5.56 NATO. What have we learned about the Infinity, and how its technology works? How does the hybrid Otter Creek Infinity technology respond to lowering blast load input severity with 5.56? Very interesting findings – this technical talk covers them. a. Big Picture and – barrel length? Why does it matter, anyway? (00:09:04) b. Solid 5.56 End Cap Performance (00:24:34) c. Vented 5.56 End Cap Performance (00:50:32) d. Vented 7.62 End Cap Performance (00:53:28) e. Performance comparison and nuance (00:56:28) 2. Sound Signature Review 6.197 – Combat Application Technologies CAT KK on the 10.3 5.56 MK18. Hybrid design advanced silencers continue to push the envelope. The past 5 years have been full of tremendous performance gains, particularly in high pressure supersonic cartridge suppression. As the competition continues, how does form factor fit into the mix? The CAT KK, and others, bring that discussion to the forefront. Introductory talk for the whitepaper published today. (01:13:25)

Today’s Topics: 1. Sound Signature Review 6.195 – FOR Systems Monarch Recce on the 10.3 5.56 MK18. Speaking of form factor… this silencer is a little over 5 inches long, as tested, and it’s ready to party. Hybrid designs continue to be developed, and the status quo just might be changing. Do short 5.56 silencers have to be loud? Technical discussion of this whitepaper published last week. a. Intro (00:06:58) b. Physical overview (00:08:55) c. Silencer design (00:14:28) d. System performance (00:18:58) 2. Sound Signature Review 6.196 – Otter Creek Labs Infinity on the 14.5-in mid-length gas M4A1. You’ve seen this durable, versatile silencer on everything from 7.62 NATO to subsonic 300 BLK to short barrel 5.56 NATO. Have we solved its riddle yet? How does the hybrid Otter Creek Infinity technology respond to lowering blast load input severity with 5.56? Very interesting findings – intro talk for today’s publication. (00:41:33)

Today’s Topics: 1. Sound Signature Review 6.194 – Dillon Rifle Company DRC556 on the 14.5 5.56 M4. Oh my goodness – more Purposely Induced Porosity silencers? Yes. PIP is proliferating. How does this adaptation of the technology perform? Technical discussion for this paper published last week – the form factor wars are heating up! a. Intro (00:05:10) b. Physical overview (00:06:38) c. Silencer design (00:09:00) d. System performance (00:11:45) 2. Sound Signature Review 6.195 – FOR Systems Monarch Recce on the 10.3 5.56 MK18. Speaking of form factor… this silencer is a little over 5 inches long, as tested, and it’s ready to party. Hybrid designs continue to be developed, and the status quo just might be changing. Do short 5.56 silencers have to be loud? Learn more about why, or why not, in today’s report! (00:36:08)