Armaspec AR-15 Sound Mitigation Buffer System (SMB)

Armaspec AR-15 Sound Mitigation Buffer System (SMB)

Product Code:
Calculated at Checkout
$49.99 $44.99



  • Single-stage drop-in replacement for your standard buffer and spring
  • Reduce felt recoil
  • Keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth and quiet operation
  • Made in the U.S.A.
  • Adjustable spring weight
  • For A1 or A2 style stocks, Fixed Stock to Carbine Spacer is needed.  Sold separately

*Main spring can be trimmed at .25 lbs per coil to reduce tension up to a max of 12 coils.


  • Actual Wight (Complete System):
    • Standard Carbine: 4.41 oz.
    • Heavy:
    • H2:
    • 9MM: 9.88 oz.
  • Equivalent Weight:
    • Standard Carbine: 3 oz.
    • Heavy:
    • H2:
    • 9MM: 6.9 oz.


  • AR-15


  • 1x Polymer Base Guide Rod
  • 1x Spring
  • 1x Buffer


So, it’s come to this. Your AR-15 runs out fine, however, it seems just a bit noisy when it cycles. You can compensate and suppress only so much until you have to admit the erroneous clatter is coming from within. When you finally address the elephant in the room, you have to concede that the noise is rubbing you the wrong way. You can take a step towards eliminating the clatter when you install an Armaspec Sound Mitigation Buffer.

It’s Beyond the Pale of Comparison

Granted, there are a number of ways to quiet the action of your AR, however, they focus mostly on what happens after the shot. The Armaspec Sound Mitigation Buffer intervenes during the mile-second that the round is fired to eliminate that noise from the action cycling. Armaspec drives past the conventional thought of suppression, into the arena of elimination where noise control is concerned.

Don’t Take Me Down

Armaspec has designed their groundbreaking sound mitigation system to solve your problem from the inside out. They focused on achieving very smooth, quiet operation of your weapon in order to keep all those crazy little noises at bay. At the very heart of your weapon is the buffer tube which gets a great deal of force with every shot fired. The Armaspec Sound Mitigation Buffer System keeps its buffer spring under control, therefore the buffer spring doesn’t rub against the buffer tube resulting in less noise when fired. Admittedly, no weapon is going to be quiet as a whisper when fired, but you can go a long way to less noise when you choose an Armaspec buffer system.

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8 Reviews

  • Armaspec SMB

    Posted by lee on 19th Apr 2021

    really like these, a significant upgrade to a regular buffer and spring. no more "boing" on recoil, it feels like less recoil too. after a few hundred rounds it looks like the rubber end on the weight is holding up well, no fraying for spreading out. I now have these in all of my AR variants

  • Works as advertised

    Posted by ERICK SCHAEFER on 21st Mar 2021

    Put this in my 6. SPC build with an A2 style fixed stock and 16" mid length gas system Bison Armory barrel. I used the H buffer and it works great no more noise when you shake the gun and it got rid of the slinky sound. when shooting.

  • Great So Far

    Posted by RGCGFMT on 26th Jan 2021

    I have one of Armapec's captive Stealth buffers on another build and like it, figured I'd give this one a try. Bought it for use with the KE Arms KP-15 polymer lower. No buffer retainer installed. Works great, build quality looks fantastic, super smooth, makes no noise at all, no malfunctions so far. Couldn't be happier, recommended, will likely buy another.

  • Armaspec smb

    Posted by Rick on 2nd Feb 2020

    Rubber ring on weight to soft hangs on buffer retainer pin. Other than that it works getting rid of that awful cheese grater sound. I will recommend to anyone thinking about one.

  • Armaspec SMB

    Posted by DAK on 19th Dec 2019

    This is an option for the SRS, I put one in my 223 Wylde A2. Great smooth cycling.

  • Armaspec SMB

    Posted by Roy on 28th Mar 2019

    Installed in my 6.5 Grendel. No function issues. Works better than stock spring and buffer.

  • Armaspec SMB

    Posted by Justin on 18th Mar 2019

    Haven’t shot it yet but, at pretty much the same price as a quality standard buffer and spring I wouldn’t go any other route. It’s smooth as butter and silent. Can’t go wrong.

  • Armaspec SMB

    Posted by Royland Abuan on 9th Nov 2018

    Functions flawlessly. Does what it was designed for. No fitment issues. Great price. Fast shipping Wing Tactical.

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