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Subsonic bullet backwards11/23/2023 ![]() ![]() If there is any single truth I do know about suppressor physics, it is this: It’s effing complicated. Why? Because reasons (obviously). Let’s look at one more image I shamelessly stole from the internet that seems to demonstrate the cartridge max pressure to suppressor volume hypothesis.Īs you can see, all of the centerfire rifle suppressors have large internal volumes and fewer baffles…. For lower pressure, low velocity rounds, you need less volume and more baffles. ![]() What does that mean exactly? Well, the word on the web is that for high pressure, high velocity rounds, you need more volume and fewer baffles. There is a lot of hearsay on the internet about proper suppressor design in conjunction with intended use. This can either be directly threaded to the barrel, or somehow affixed to a threaded muzzle device.Įnd Cap – This is the front end of the suppressor that holds the suppressor together and is the last thing the bullet will travel through. Thread Attachment – I wasn’t sure what to call this one, but this is the back end of the suppressor that affixes to the barrel. I like to reinforce the primary blast chamber using thin steel tubing (it will also act as a spacer for adjusting volume). It creates a chamber that will take the major brunt and abusive force of the propellant gases right as they enter the suppressor. Primary Blast Baffle/Chamber – This is the very first baffle in the baffle stack. They come in all different shapes, but we will be using conical ‘M’ baffles in this discussion. Suppressor Baffles – These are the structures within the suppressor that disrupt the flow of propellant gases as they exit the barrel and form chambers within the suppressor which allow those gases to expand to a lower pressure. ![]() Suppressor Body/Main Tube – this is the exterior portion or tube portion of the suppressor. ![]() Before we delve into this, however, let’s go over and define some nomenclature: Since I’ve been staring at those photographs for far longer than I will ever admit, I’ve begun to postulate about what design features might make suppressors quiet and efficient. It sounds weird, but I could look at suppressor cutaways just about all day and it would just pump me up about wanting to design a baffle stack… One bit of inspiration came when I stumbled across a post by the Truth About Guns blog that has photographs of several big name manufacturer’s suppressors cut in half, exposing their baffle designs. I truly enjoyed this part of the process because it pushed me to look around and get inspired by all of the different designs out there used by the big name manufacturers. One of the tasks you must accomplish prior to filing an ATF Form 1 is to draw up a diagram that you will submit with the form. Now that I’m fresh off of my second suppressor build, I thought it would be a great time to go over some ideas I’ve had about sound suppressor design. One of the things that truly astounds me about suppressors is the technology and engineering involved in making them work effectively. Since then, I’ve procured a SilencerCo Harvester 30 and made another Form 1 suppressor. It’s hard to believe, but almost one year ago I built my very first sound suppressor out of a Maglite flashlight (via ATF Form 1). 300 Blackout piston gun, I’ve been super fascinated by sound suppressors over the past two years. If you haven’t already guessed from my post about making a. of A), it is illegal to manufacture a suppressor without seeking approval and obtaining a tax stamp from the Bureau of Alcohol, Tobacco, Firearms, and Explosives (BATFE) via a Form 1, or via obtaining a Class 2 Federal Firearms License and paying the appropriate Special Occupational Tax (SOT). I’m assuming that if you are reading this, you are an intelligent adult who is aware of what laws govern sound suppressors in your country. ![]()
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