New From Armaspec: AR Sound Mitigation Buffer

armaspec buffer

I’m a huge fan of JP Rifles’ Silent Captured Spring. Its smooth and quiet operation makes the AR-15, well, smoother and quieter. Less toy-like. But it’s expensive at about $139. Armaspec appears to have developed a solution to quiet operation and high cost with their Sound Mitigation Buffer (SMB). It costs a cool . . .

$45. No idea yet on how it functions, but we’ll get our hands on one soon and find out.

armaspec buffer


  1. avatar Mark N. says:

    So the solution here is to make a smaller spring that doesn’t bang against the sides of the tube with a guide rod to keep the spring from binding up. Works for me. The price works pretty well too..

  2. avatar pwrserge says:

    At $45, it’s in the same ballpark as a normal spring / buffer combo. Tuning issues aside (yes, you have to turn the springs in these things to get reliable cycling), there’s not really a reason not to get one.

    1. avatar SomeGuy says:

      Run an adjustable gas block. No spring tuning needed then.

  3. avatar JWinR says:

    I just got an SRS that costs $30ish more, whats the difference?!

    1. avatar SomeGuy says:

      The SRS is a dual spring setup, this is a single spring. Less complicated = cheaper I guess.

  4. avatar dph says:

    and………out of stock.

  5. avatar strych9 says:

    I guess I’ve just never really noticed the problem these things are meant to fix.

    That said, the price on this one is reasonable.

    1. avatar Tim says:

      I don’t see it as a “problem” (at least not a $45-$140 problem), but I do notice it if I think about it. I’m relatively new to AR’s so, I just figured it was supposed to do that! FWIW, the “burning cat pee/ammonia” smell of whatever powder Federal uses in M193 bothered me way more than the sproing my first time out!

      Of the three AR’s I’ve fired, I think my buddy’s DPMS AR-10 was the worst. It sounds like he has a whammy bar in there! Mine aren’t nearly as obnoxious.

      Also, I think it depends on the earpro you’re running. Obviously, a hard set of muffs that make direct contact with the stock are going to ring more than foam plugs.

      1. avatar Jeremy S. says:

        Yeah especially if you then shoot suppressed, that SPROING is really obvious and kind of annoying.

        1. avatar strych9 says:

          I shoot suppressed almost exclusively and still have never noticed this even with sound enhancing muffs.

          Now I’m thinking I’ll look for it next time I’m out and won’t be able to ignore it after that. Like when you notice a car on the road and think “I’ve never seen that before” but then realize that you see them everywhere after you notice the first one.

        2. avatar strych9 says:


          Sitting here playing with the bolt release on the AR I grabbed out of my safe I can’t get a “sproing” noise out of it. Still not seeing what these products are meant to do.

          Maybe I’m just lucky with this lower, maybe I just don’t hear that frequency or maybe people just need to stop buy cheap gear and then upgrading it. I dunno. I don’t hear the spring at all and I don’t detect any vibration from the rifle I would associate with a spring vibrating after the BCG goes back into battery.

          It’s all lost on me at this point.

        3. avatar No one of consequence says:

          S9: I don’t notice it either, just with the bolt release; however, I have noticed it when I fire a round. I suspect it’s coming from the rapid compression as much as anything else.

          Tim: Thank you, that describes it pretty well! Best to shoot those outdoors…

        4. avatar Nigel the expat says:

          Yep. Running subs on a 300BLK w/ Omega, the sproing is the loudest noise maker.

          Not so noticeable when running suppressed supers. But that is to be expected.

    2. avatar Shwiggie says:

      It makes a very noticeable difference when running silenced 300BLK.

  6. avatar Hank says:

    I kinda like the spring sprong sound. Makes me giggle sometimes.

  7. avatar Joe R. says:

    Please do, I also like JP a LOT, worth the $$$ but would like same for somewhat less. Might tolerate a market equivalent.

  8. avatar Tom in Oregon says:

    Now THATS a great price point!

  9. avatar JTF says:

    Anyone thats ever shot an m16a2 or likely any other older fixed stock knows it isn’t that bad now.

  10. avatar sound awake says:

    i like the stock spring and buffer setup

    i know that when i fire a round and i dont hear a bunch of racket in the receiver extension i know the bolt is locked back on an empty mag

  11. avatar Keltex78 says:

    It suppose it varies a lot between rifles. My rifle (Diamondback DB15) has a quiet spring and I’ve never noticed any noise. My brother-in-law has a 6.5 Grendel, and the spring in that rifle sounds like a pogo stick in your ear.

    I would be interested in this setup if I were building my own rifle from the ground up, but as-is, not much use for me. At least not until I’m able to things to the point where I can afford to get setup to turn out some 80% lowers and prep a box full to keep in storage…

  12. avatar Keltex78 says:

    It suppose it varies a lot between rifles. My rifle (Diamondback DB15) has a quiet spring and I’ve never noticed any noise. My brother-in-law has a 6.5 Grendel, and the spring in that rifle sounds like a pogo stick in your ear.

    I would be interested in this setup if I were building my own rifle from the ground up, but as-is, not much use for me. At least not until I’m able to things to the point where I can afford to get setup to turn out some 80% lowers and prep a box full to keep in storage…

  13. avatar Sian says:

    Well, I’ll be looking forward to an in-depth review on this.

  14. avatar No one of consequence says:

    I don’t know; the whole BOINNNNG! thing brings a certain … Road Runner-ish vibe to range days…

  15. avatar Geoff PR says:

    Right at this moment, a Leftist POS somewhere is drafting a “Common Sense” gun law that will make it a felony to own, transfer, or posses “…any device that in any way *whatsoever* reduces the sound level of a firearm from it’s factory stock condition.”

    “It’s for the children”, you know…

  16. avatar Old Region Fan says:

    WOW again What is the problem this device fixes ? I never knew the way my rifle sounds when its firing was suppose to matter if I struck my intended target ? Oh I’m sorry did the “Sprong” noise cause you to knock over your Starbucks mocha late with sprinkles on top ? I hope you don’t spill it on your skinny jeans I weep for humanity !

  17. avatar little horn says:

    JP’s is awesome in everyway except price. there is NO reason for it to cost that much. i’ve been waiting for this.

    1. avatar Dave says:

      I feel ya. And wish my JP parts didn’t cost so much. But this new product is definitely not an apples to apples comparison with JP. Reducing the spring noise is just a bonus for me. But increasing mass thereby increasing the reliability while running suppressed is the main reason I went with JP for for my last AR10 build. It works in tandem with my JP heavy variable mass bolt carrier to make certain that bolt busts through all the additional fouling from running suppressed. So if reliability while suppressed is an issue for you, look to JP. If a little sound mitigation in a rifle that’s not suppressed is your goal, this is cheap enough to play with, sure.

    2. avatar Dan Backslide says:

      Sure there is. Costs of manufacturing and materials, especially when in regards to an item of tight tolerances can be high. Especially when using materials that are extremely tough to work with like tungsten. Not only that but there’s the costs of research and development, filing fees for patents, and the cost of attorneys to defend your intellectual property.

      For example: JP has a patent on their silent captured system that I’ve linked elsewhere. This product is clearly in violation of that patent. JP is more than likely going to have an attorney send Armaspec a cease and desist letter, and there will be a whole legal wrangle over it. Attorneys cost a lot of money.

      So no there’s plenty of reason why it has the price tag it does.

      1. avatar Dan Backslide says:

        Actually doing a simple google search using information found in the patent documentation revealed that Armaspec has already been served, on December 26, 2017, regarding patent infringement of patents owned by J&K IP Assets, LLC. in California.,_LLC_v_Armaspec,_Inc

        For those that don’t know, J&K IP Assets, LLC. Is the company that owns the intellectual property of JP Enterprises. And it’s owned by the same people.

  18. avatar Phil Twiss says:

    Looks like it gets around the cost thing by removing the variable buffer weights… Given changing buffer weight is not something most would need … Given most of us run a rifle buffer with rifle gas systems and so on… and rarely if ever change the upper to something radically different… They have paired down the solution to answer the question not all the possible answers

  19. avatar Chazbo says:

    There’s a much cheaper cure for the SPROING, and that’s simply a good quality spring.
    I use the chrome silicon ones that Damage Industries sells (I’m certain that other places carry an equivalent) at about 7-8 dollars a pop on sale and they eliminate 90% or more of the noise by my guesstimation.

  20. avatar MIO says:

    A high dollar fix for a non problem

    1. avatar SomeGuy says:

      How is it “high dollar”? A good quality carbine spring is about $10 and a good quality buffer runs $20-30. Hell, Geissele sells a braided spring and carbine buffer kit that costs north of $60!

      I run my guns suppressed, and I use adjustable gas blocks, lightweight carriers, etc. You can argue that anything other than stock is a “fix for a non-problem” and, maybe for you that is the case, but it’s not the case for all of us.

  21. avatar Jason says:

    Like pwrserge said, at this price, no reason to not get it. I’m not going to go out and replace all my rifles current spring/buffers. But on new rifle builds, I’ll get this set up. I don’t really hear a bunch of racket in my rifles unless my springs/buffer tube are dry. I usually oil up the spring and the inside of the buffer tube lightly. It makes it a lot quieter. So I’m not worried about my current rifles needing this. But $45 is about what my regular spring/buffers cost so I might as well get this for future stuff. Glad they aren’t out to kill everyone’s wallets on this.

  22. avatar Dan Backslide says:

    Armaspec appears to be in violation of patents owned by JP Enterprises. Since it was filed in 2012, and the whole sound issue is also something talked about in the patent, and patents are valid for up to 20 years, I see a cease and desist letter in their future, and a visit from lawyers.

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