$100 .308 Suppressor

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There is a thread over at AR15.com that has some video, a parts list, and some rough instructions for building a suppressor:
http://www.ar15.com/forums/t_1_5/1693688_The__100__308_Suppressor__That_is_as_good_as_an__800_one_____New_Video_12_10_in_OP.html

Okay, so not exactly $100 (since you’d need the $200 NFA stamp), but the parts can be had for that amount. But for $300, being able to construct your own suppressor doesn’t sound too bad. If it is functional, it would sure beat dropping $1k+.

This almost makes me want to submit a Form 1 and give it a try. I would like to see a video of the construction, or maybe some assembly plans, but it seems pretty straightforward. I’d also like to see a comparative test against a commercial suppressor and this one with a decibel meter involved.

Has anyone here gone through the process and created a suppressor? Does this seem like a reasonable and possible project?

Thanks to Jay D for the find.



Tom is a former Navy Corpsman that spent some time bumbling around the deserts of Iraq with a Marine Recon unit, kicking in tent flaps and harassing sheep. Prior to that he was a paramedic somewhere in DFW, also doing some Executive Protection work between shifts. Now that those exciting days are behind him, he has embraced his inner “Warrior Hippie” and assaults 14er in his sandals and beard, or engages in rucking adventure challenges while consuming craft beer. To fund these adventures, he writes medical software and builds websites and mobile apps. His latest venture is as one of the founders of IronSights.com; a search engine for all things gun related. He hopes that his posts will help you find solid gear that will survive whatever you can throw at it–he is known (in certain circles) for his curse…ahem, ability…to find the breaking point of anything.


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  • Geoffry K

    I submitted a Form 1 as an individual and ATF cashed my check 29 weeks ago, still waiting. I will be building the “MagLite Silencer” for my 5.56 AR as soon as I get the Tax Stamp. I figure *maybe* late Jan or early Feb., but rumor says 1 year wait now, so could be as late as May.
    It is a simple Parker Hale design. I don’t have a lathe to make a monocore, so individual baffles is the easiest way to go.

    • Doc Rader

      Very cool. I’m definitely interested in hearing how that turns out.

    • David S.

      I just got my stamp12-12-14 and the ATF cashed my check in early April of this year. Good luck. By the way, a dealer told me that the wait times should be getting a little shorter but I guess we will see. I am about to get another one after the first of the year.

  • echelon

    Sigh…

    I’d liketa have one uh these but Massa won’t let me have un ’til I’sa pay ‘im up real good an he give me his blessin’. So I just bein’ a good boy fo Massa in the meantime…

  • Vhyrus

    In theory it shouldn’t be terribly difficult to make a suppressor. If a 5 dollar oil filter does a decent job it can’t be that hard.

    • Pete in Alaska

      @Vhyrus
      Funny you should mention oil filter supressors! Several exterpriseing guys made and marketed an adaptor so one could mount a oil filter on a threaded barrel. The adaptor was or is like $70 bucks ……. And your $200 Tax Stamp.
      From what I’ve seen they are very effective.

  • Ethan

    I made my first Form 1 out of about $50 of materials, but I could have gone much cheaper – especially if it wasn’t for center fire rifle cartridge. The device isn’t complicated, just requires a higher degree of precision that most can achieve in their garage.

    • Shadow

      Build your baffles around a slightly oversized dowel to ensure proper alignment.

  • Pete in Alaska

    Yes, not only a reasonable and possible project but can be simply and easly done.
    An effective supressor can be assembled from the parts found at your local hardware store or Big Box DIY store with the use of simple hand tools. Deciable reduction has a lot to do with design, the first two capture chambers (at the muzzle attachment point) and how they are constructed are the primary determining factor to overall sound reduction. A supressor dose not reduce the sound shock wave of the bullit if the bullet is traveling at super sonic volocity one will hear it A suppressor ONLY reduces the sound of spent propellant discharge by containing it and cooling it and there is also a reduction in felt recoil.
    There are a number of good DYI designs out there. Some require more tools and skills than others. Even the very simple PVC suppressors are extremly effective, even for large calibers but of short life spans. Of course if you have a fair metal lath (that will take stock at least 1.75 inch) or a water jet CNC cutter available to you, your options are somewhat expanded and almost anything may be posdible.
    ALL SUPRESSORS REQUIRE A FEDERAL TAX STAMP!! Just having the parts for one all in one place can be a problem if ATF&E or other agencies determin that a Class III violation is taking place. Making a CLASS III device without proper paperwork and stamps is a Federal offense. You ignor this at your own risk. Follow the rules, keep you mouth shut, be carful when you use, transport, or attach to a firearm.
    For $100 in materials one should be able to produce a high end, long life unit that when finished should be of as good a quality as a retail production unit. There is no reason that a unit can’t be produced in ones basement for $30 in materials, simple hand tools and a winter evening. Just saying . . I don’t know that first hand of course but have been told that might be the case.
    I’m also told that 1 1/8 inch alumininum ribbed shower rod that has an inner diameter of 1inch makes excellent cans. A five foot rod costs about $8 and one can cut tube to the desired leanth needed to fit a caliber. From 5.5 inches to 14 inches on might expect to get several cans out of it that might be effective thru most .30 caliber munitions. I’ve also heard that Brass tarp grommets work very well as the have an exact 1 inch outer diameter (0.5″ inner hole) that fits very neetly in to a shower rod tube. Just the other day I happen to get Stainless Steel tarp gromets of the same dimensions from Amazon 75 pairs for $10.80 / free shipping, to repair a tarp I have. Figured that they would resist corrosion much better than Brass seem to do . . . In a tarp. stainless Steel window screen is easly found too and may have a use in some projects.
    I would go so far to suggest that for someone who may be a prepper/survivalist/SHTF kind of person, and that having the raw materials, knowledge and skill set to build such a device might be a fairly valuable thing to know.
    The actual physics of how a supressor functions and why may be something worth looking into and understanding should one decide to explore this device with intent to understand how to make it work better.
    Liked the video, keep up the good work!
    Knowalage is power!!!
    Safe Holidays to all!

  • Grindstone50k

    I’d let you borrow mine, but it’s a Mark I type and it only rates from “What?” to “DEAR GOD I’M BLEEDING FROM MY EARS”.

  • Doc Rader

    Good discussion, fellow enthusiasts. I think I may file a Form 1 and look at giving it a try.

  • spencer60

    Correct me if I’m wrong, but if you Form 1 your own suppressor and have to swap out a part, doesn’t that take another Form 1 (unless you are an FFL/SOT of course).

    The way it was told to me, even swapping a single baffle requires a whole new stamp since you are essentially building a ‘new’ suppressor with that part.