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Posted: 7/29/2025 8:36:40 AM EDT
| Is there information available on baffle design for .30, 9mm, and .22lr suppressors? Something that can be turned on a manual lathe. I'm looking at doing a full titanium build for a .308 and want to read about spacing and baffle shape to plan things out. |
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There are alot of opinions, but I"ll give you mine. For supersonic centerfire your best bet, taking into account manufacturing yourself, are simple cones. Both 60* and 50* cones work well. If you are putting them in a tube, a good size is a 1.625" OD tube with 1.5" OD baffles. You can also weld the baffles and have a tubeless build if you have that capability. I would suggest single clipping the cones. Here's when options really open up. You can use 60* cones for your 9mm can as well. However spacing for all 3 of your cans will be different. Rimfire is easy. As in almost anything from flat washers to cones, to K baffles, to slanted monocores......anything that is roughly 1" x6" long will work well ON A RIFLE. It's on handguns with short barrels design will make a difference. On a handgun you have to deal with first round pop much more than on a rifle. I have used 45* cones with double clips 180* apart for rimfire pistols. Space them about .400" apart and get as many in as you can within about a 6" tube. In general, supersonic rifle rounds need a can roughly 6-8" long with 6-8 baffles. You'll need a decent blast chamber space, say roughly 2" from end of can to tip of first baffle. More baffles than this may help but you get to a point that it can't be quieter than the sonic crack or the semi auto action so you're just adding weight. Subsonic cans do seem to benifit from more baffles and smaller blast chambers. good luck and welcome to the addiction |
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Originally Posted By sclearman: There are alot of opinions, but I"ll give you mine. For supersonic centerfire your best bet, taking into account manufacturing yourself, are simple cones. Both 60* and 50* cones work well. If you are putting them in a tube, a good size is a 1.625" OD tube with 1.5" OD baffles. You can also weld the baffles and have a tubeless build if you have that capability. I would suggest single clipping the cones. Here's when options really open up. You can use 60* cones for your 9mm can as well. However spacing for all 3 of your cans will be different. Rimfire is easy. As in almost anything from flat washers to cones, to K baffles, to slanted monocores......anything that is roughly 1" x6" long will work well ON A RIFLE. It's on handguns with short barrels design will make a difference. On a handgun you have to deal with first round pop much more than on a rifle. I have used 45* cones with double clips 180* apart for rimfire pistols. Space them about .400" apart and get as many in as you can within about a 6" tube. In general, supersonic rifle rounds need a can roughly 6-8" long with 6-8 baffles. You'll need a decent blast chamber space, say roughly 2" from end of can to tip of first baffle. More baffles than this may help but you get to a point that it can't be quieter than the sonic crack or the semi auto action so you're just adding weight. Subsonic cans do seem to benifit from more baffles and smaller blast chambers. good luck and welcome to the addiction Any Pic's on this? |
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Lots of photos if you look Search for suppressor baffle cutaway photos Or are you looking for machinist drawings? |
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Originally Posted By VinnieBoomBahReborn: Lots of photos if you look Search for suppressor baffle cutaway photos Or are you looking for machinist drawings? Thanks. I have looked at cut away photos. I was just wondering if there was anything available with measurements and possibly theory on cone angles, spacing and clipping. I have 2 rimfire cans that I can get measurements from. I was more interested rife cans. None of mine come apart. |
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Originally Posted By JKrammes: Thanks. I have looked at cut away photos. I was just wondering if there was anything available with measurements and possibly theory on cone angles, spacing and clipping. I have 2 rimfire cans that I can get measurements from. I was more interested rife cans. None of mine come apart. Your not going to find a set of plans if that's what you are looking for. Building takes some research and then putting things together. Lot's of questions you need to answer. Like what's the goal for this can? (lightweight, max sound reduction, heavy duty use....) You can't have all those at the same time. as far as measurments, I've pretty much already given you that. |
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Originally Posted By sclearman: Your not going to find a set of plans if that's what you are looking for. Building takes some research and then putting things together. Lot's of questions you need to answer. Like what's the goal for this can? (lightweight, max sound reduction, heavy duty use....) You can't have all those at the same time. as far as measurments, I've pretty much already given you that. Originally Posted By sclearman: Originally Posted By JKrammes: Thanks. I have looked at cut away photos. I was just wondering if there was anything available with measurements and possibly theory on cone angles, spacing and clipping. I have 2 rimfire cans that I can get measurements from. I was more interested rife cans. None of mine come apart. Your not going to find a set of plans if that's what you are looking for. Building takes some research and then putting things together. Lot's of questions you need to answer. Like what's the goal for this can? (lightweight, max sound reduction, heavy duty use....) You can't have all those at the same time. as far as measurments, I've pretty much already given you that. Yes. Thanks. Weight is my top concern, then Db reduction for the rifle cans. Maybe a long quiet one later. I have an idea for an integral .22lr AR upper that I really want to get working on. I need to have some specs to submit the Form 1. |
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There are almost no 'books' except some from 50 years ago that are seriously outdated, but if your up for doing some reading and digging through years of posts some good info can be found at https://www.silencertalk.com/forum/viewforum.php?f=10 There is also Form1.org which has some good info as well, the OG Form 1 forum had TONS of good info but it was nuked by the webhost for a bogus TOS violation and years of great info was lost  One thing to keep in mind about that one. . .  And full disclosure, I'm one of the ones most responsible for that reputation. "The Lord And VinnieBoomBah helps those that help themselves" 
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| I'll echo what Vinnie said, both of us are members at those boards. to help you with how to research break it down into smaller questions. Don't ask "how should I build my can' Instead research blast chamber size. Also research baffle design. and of course research baffle spacing. Lot's of good information. Silencer Talk has slowed down a lot but there is still a ton of information, just a few pages back. |
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https://www.mdpi.com/2076-3417/13/7/4426 This paper shows some of what’s being researched re: simulations. There are fluid dynamic programs that are used, but I’m not sure how/if this will help you. I also posted an older paper from Frankfort Arsenal, 1968 to assess available silencers & materials: https://apps.dtic.mil/sti/pdfs/AD0847383.pdf Cheers! |
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Originally Posted By 32ACP: https://www.mdpi.com/2076-3417/13/7/4426 This paper shows some of what’s being researched re: simulations. There are fluid dynamic programs that are used, but I’m not sure how/if this will help you. I also posted an older paper from Frankfort Arsenal, 1968 to assess available silencers & materials: https://apps.dtic.mil/sti/pdfs/AD0847383.pdf Cheers! Fluid dynamic programs aren't very helpful because fluids don't compress or significantly change volume with temperature |
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Originally Posted By VinnieBoomBahReborn: Fluid dynamic programs aren't very helpful because fluids don't compress or significantly change volume with temperature Originally Posted By VinnieBoomBahReborn: Originally Posted By 32ACP: https://www.mdpi.com/2076-3417/13/7/4426 This paper shows some of what’s being researched re: simulations. There are fluid dynamic programs that are used, but I’m not sure how/if this will help you. I also posted an older paper from Frankfort Arsenal, 1968 to assess available silencers & materials: https://apps.dtic.mil/sti/pdfs/AD0847383.pdf Cheers! Fluid dynamic programs aren't very helpful because fluids don't compress or significantly change volume with temperature True! Thanks for pointing that out, since cooling & allowing expansion slowing release of gas is how cans work. My limited understanding is the fluid dynamics programs is to look for the theoretical “longest route” to do this, but at least in my brain, the single points doesn’t translate the flow into the dynamic 3D gas flow reality. The suggestion was made only as a tool to explore baffle design options at home. Personally, I think additive manufacturing is the future for silencers, but heat absorption with ablatives & flow disruption with polymer wipes has returned, I wonder when metal meshes/packing will return, aside from the emerging 3D printed iteration. |
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Originally Posted By JKrammes: Is there information available on baffle design for .30, 9mm, and .22lr suppressors? Something that can be turned on a manual lathe. I'm looking at doing a full titanium build for a .308 and want to read about spacing and baffle shape to plan things out. Tada....     9mm M-Baffle Suppressor with Nielson Device 223 rifle I'd CNC these but you can just make note of the measurements in CAD and walk over to your lathe and hand make them to spec. |
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Originally Posted By Nexttime: Tada.... https://i.imgur.com/jELOCY5.png https://i.imgur.com/MIqTL53.png https://i.imgur.com/5TpSGOY.png https://i.imgur.com/nOzpQps.png 9mm M-Baffle Suppressor with Nielson Device 223 rifle I'd CNC these but you can just make note of the measurements in CAD and walk over to your lathe and hand make them to spec. Like this Attached File |
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Originally Posted By Jupiter7: Like this https://www.ar15.com/media/mediaFiles/423396/IMG_1401_jpeg-3638667.JPG Looks pretty good. How would rate the performance compared to a similar design commercial one? |
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Originally Posted By Nexttime: Looks pretty good. How would rate the performance compared to a similar design commercial one? It's every bit as good as any commercial can built in similar fashion. This is a smaller outside diameter can though, made to use factory pistol sights. It's also a little on the heavy/long side , length to makeup volume for diameter. It uses the Gemtach Lid booster. The clips were done with a dremel. |
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