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Armaspec C Sound Mitigation Gen3 Buffer Up to 10% Off w/ Free Shipping — 7 models

Special offer available for this product. Click here to see!
Armaspec H3 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H3
Armaspec H2 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H2
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec H Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H
Armaspec AR10 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-AR10
Armaspec 9 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-9
Armaspec Sound Mitigation Buffer H3 Gen3, SS/Black, ARM258-H3
Armaspec Sound Mitigation Buffer H3 Gen3, SS/Black, ARM258-H3
Armaspec Sound Mitigation Buffer H2 Gen3, SS/Black, ARM258-H2
Armaspec Sound Mitigation Buffer H2 Gen3, SS/Black, ARM258-H2
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer H Gen3, SS/Black, ARM258-H
Armaspec Sound Mitigation Buffer H Gen3, SS/Black, ARM258-H
Armaspec Sound Mitigation Buffer 9 Gen3, SS/Black, ARM258-9
Armaspec Sound Mitigation Buffer 9 Gen3, SS/Black, ARM258-9
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec C Sound Mitigation Gen3 Buffer, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec H3 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H3
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Armaspec H3 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H3
Armaspec H2 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H2
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Armaspec H2 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H2
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
3 of 22 images
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec H Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H
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Armaspec H Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H
Armaspec AR10 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-AR10
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Armaspec AR10 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-AR10
Armaspec 9 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-9
6 of 22 images
Armaspec 9 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-9
Armaspec Sound Mitigation Buffer H3 Gen3, SS/Black, ARM258-H3
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Armaspec Sound Mitigation Buffer H3 Gen3, SS/Black, ARM258-H3
Armaspec Sound Mitigation Buffer H3 Gen3, SS/Black, ARM258-H3
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Armaspec Sound Mitigation Buffer H3 Gen3, SS/Black, ARM258-H3
Armaspec Sound Mitigation Buffer H2 Gen3, SS/Black, ARM258-H2
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Armaspec Sound Mitigation Buffer H2 Gen3, SS/Black, ARM258-H2
Armaspec Sound Mitigation Buffer H2 Gen3, SS/Black, ARM258-H2
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Armaspec Sound Mitigation Buffer H2 Gen3, SS/Black, ARM258-H2
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
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Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
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Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer H Gen3, SS/Black, ARM258-H
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Armaspec Sound Mitigation Buffer H Gen3, SS/Black, ARM258-H
Armaspec Sound Mitigation Buffer H Gen3, SS/Black, ARM258-H
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Armaspec Sound Mitigation Buffer H Gen3, SS/Black, ARM258-H
Armaspec Sound Mitigation Buffer 9 Gen3, SS/Black, ARM258-9
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Armaspec Sound Mitigation Buffer 9 Gen3, SS/Black, ARM258-9
Armaspec Sound Mitigation Buffer 9 Gen3, SS/Black, ARM258-9
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Armaspec Sound Mitigation Buffer 9 Gen3, SS/Black, ARM258-9
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
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Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec C Sound Mitigation Gen3 Buffer, SS/Black, ARM258-C
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Armaspec C Sound Mitigation Gen3 Buffer, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
19 of 22 images
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
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Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
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Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C
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Armaspec Sound Mitigation Buffer Carbine Gen3, SS/Black, ARM258-C

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Questions & Answers
Could you please provide instructions on how to disassemble the system and adjust the weights? Expert Answer

As per the manufacturer:
Insert polymer base with guide rod into the buffer tube.
Insert desired spring on the guide rod.
Insert the buffer over the spring.
Email us at Techsales@opticsplanet.com or contact the manufacturer directly for further assistance.

by Ethan, Gear Expert, January 4, 2023
See 2 More Answers
Will this work with a mil-spec buffer tube? Manufacturer Answer

Yes these are designed to work with mil-spec buffer tubes.

by Armaspec Customer Service, Manufacturer, May 29, 2025
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
h3 sound mitigation buffer by Jay P, Verified Owner, March 8, 2026
Recently installed a forced reset safety selector and needed a heavier buffer, a friend suggested I get the h2 or h3 so I placed my order for one. It came super fast and worked great right out the package. So much so that I ordered another h3 for ano...
Read More...
2/2 found this helpful
Helpful Positive Review
Excellent build and finish quality. by S. Templar, D.D., Verified Owner, April 28, 2024
I've been using devices like this for a very long time. The quality of this unit is absolutely as good as any I previously owned. This one is quite a bit less expensive than many of them. Installing these without the use of the buffer retention p...
Read More...
3/3 found this helpful
Helpful Positive Review
Great Price for the upgrade by Jesse Sando, Verified Owner, November 30, 2024
I'm really happy with this buy. My old buffer was falling apart, instead of buying a new spring and buffer this was barely any more $ so I went for it. Worked in my 300 blk pistol and my 5.56 piston pistol. While it definitely does mitigate the sound...
Read More...
2/2 found this helpful
Helpful Positive Review
Decent! And around the price of a standard spring/weight by James, Verified Owner, April 6, 2024
Zero cycling issues so far. I also own the "other" one that costs 4x as much, and while this really isn't that product, it is still great, especially for the price being in the same area is any xyz brand buffer and spring combo. I can definitely sepa...
Read More...
1/1 found this helpful
Helpful Positive Review
Armaspec is GTG by Max, Verified Owner, September 12, 2022
The Armaspec Sound Mitigation Buffer system is one of a kind. This company has provided real upgrades for the AR platform. The Gen 3 SMB is exactly what needed to happen with the SMB. The new captured system and harder rubber face addressed my main i...
Read More...
4/8 found this helpful
Helpful Positive Review
Definitely a step up with the noise mitigation. by Thomas Desjardins, Verified Owner, June 23, 2023
I bought this captive buffer spring to add to my KE Arms Kp 15 lower to help balance the ejection pattern for a mid length gas system. It is better than the stock buffer and spring. Definitely a step up with the noise mitigation.
1/1 found this helpful
Read All 40 Reviews
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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Armaspec C Sound Mitigation Gen3 Buffer

The Gen3 Sound Mitigation Buffer SMB is a captured single-stage drop-in replacement for your standard buffer and spring. The SMB is designed to keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth, quiet operation. Pat#US8800424/Pat. Pendingimage

WARNING: California`s Proposition 65

Specifications for Armaspec C Sound Mitigation Gen3 Buffer:

Manufacturer: Armaspec
Color: Stainless/Black
Country of Origin: USA

Features of Armaspec C Sound Mitigation Gen3 Buffer

  • 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
  • Adjustable spring weight (Main spring can be trimmed at .25 lbs per coil to reduce tension up to a max of 12 coils)
  • made in specialized factories
  • Lifetime Warranty

Package Contents:

  • Armaspec C Sound Mitigation Gen3 Buffer

Armaspec C Sound Mitigation Gen3 Buffer Orderable Models

List of Orderable Models

  • Armaspec C Sound Mitigation Gen3 Buffer, SS/Black, ARM258-C , MPN: ARM258-C , UPC: 810048492435 , Code: AMS-BFA-SMT2B-ARM258-C
  • Armaspec H Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H , MPN: ARM258-H , UPC: 810048492442 , Code: AMS-BFA-SMT2B-ARM258-H
  • Armaspec AR10 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-AR10 , MPN: ARM258-AR10 , UPC: 810048492480 , Code: AMS-BFA-SMT2B-ARM258-AR10
  • Armaspec 9 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-9 , MPN: ARM258-9 , UPC: 810048492473 , Code: AMS-BFA-SMT2B-ARM258-9
  • USED, Armaspec 9 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-9 , MPN: ARM258-9-EDEMO , Code: AMS-BFA-SMT2B-ARM258-9-EDEMO-OB-C
  • Armaspec H3 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H3 , MPN: ARM258-H3 , UPC: 810048492466 , Code: AMS-BFA-SMT2B-ARM258-H3
  • Armaspec H2 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H2 , MPN: ARM258-H2 , UPC: 810048492459 , Code: AMS-BFA-SMT2B-ARM258-H2

Armaspec C Sound Mitigation Gen3 Buffer Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Armaspec H3 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H3 , MPN: ARM258-H3-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H3-EDEMO-RE-C
  • USED, Armaspec H2 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H2 , MPN: ARM258-H2-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H2-EDEMO-IN-C
  • USED, Armaspec 9 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-9 , MPN: ARM258-9-EDEMO , Code: AMS-BFA-SMT2B-ARM258-9-EDEMO-RE-C
  • USED, Armaspec H Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H , MPN: ARM258-H-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H-EDEMO-RE-C
  • USED, Armaspec H3 Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-H3 , MPN: ARM258-H3-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H3-EDEMO-RE-B
  • DEMO, Armaspec H2 Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-H2 , MPN: ARM258-H2-DEMO , Code: AMS-BFA-SMT2B-ARM258-H2-DEMO
  • USED, Armaspec H2 Sound Mitigation Gen3 Buffer, SS/Black, ARM258-H2 , MPN: ARM258-H2-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H2-EDEMO-OB-A
  • USED Armaspec H3 Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-H3, EDEMO4, Condition Fair, Other , MPN: ARM258-H3-EDEMO4 , Code: AMS-BFA-SMT2B-ARM258-H3-EDEMO-OT-D
  • USED Armaspec 9 Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-9, EDEMO1, Used, Condition Like New , MPN: ARM258-9-EDEMO1 , Code: AMS-BFA-SMT2B-ARM258-9-EDEMO1
  • USED, Armaspec C Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-C , MPN: ARM258-C-EDEMO , Code: AMS-BFA-SMT2B-ARM258-C-EDEMO-US-U
  • USED Armaspec AR10 Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-AR10, EDEMO2, Used, Condition Fair , MPN: ARM258-AR10-EDEMO2 , Code: AMS-BFA-SMT2B-ARM258-AR10-EDEMO2
  • USED Armaspec H Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-H, EDEMO1, Used, Condition Fair , MPN: ARM258-H-EDEMO1 , Code: AMS-BFA-SMT2B-ARM258-H-EDEMO1
  • USED, Armaspec H2 Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-H2 , MPN: ARM258-H2-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H2-EDEMO-IN-D
  • USED, Armaspec H Sound Mitigation Gen3 Buffer, Stainless/Black, ARM258-H , MPN: ARM258-H-EDEMO , Code: AMS-BFA-SMT2B-ARM258-H-EDEMO-RE-B
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