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Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 – Multiple Buffer Weights Available

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Improved & Easy-To-Install Captive Buffer Weights For AR Builds

The Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 is a quick and easy replacement for your standard buffer and spring. It is designed to keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth and consistent operation as well as providing less noise when firing the weapon.

The SMB also helps significantly in reducing the felt recoil which results in an excellent return to target acquisition, giving the shooter more accurate follow-up shots.

Multiple Buffer Weights

The Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 is available in different buffer weights such as Carbine, Heavy, H2, H3, 9MM, and AR-10. (Please choose in the dropdown above for the correct buffer weight).

Note For 9MM: For proper function of the SMB in your 9mm rifle or pistol, the extra weight on the back of the bolt carrier needs to be removed. It is held in with a spring/roll pin.

Features:

  • Single-stage captured 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 the U.S.A.
  • Lifetime Warranty

Specifications:

  • Actual Weight (Complete System):
    • Carbine: 4.41 oz.
    • Heavy: 4.91 oz.
    • H2: 5.81 oz.
    • H3: 6.71 oz.
    • 9MM: 9.88 oz.
    • AR-10: 7.20 oz
  • Equivalent Weight:
    • Carbine: 3.3 oz.
    • Heavy: 3.8 oz.
    • H2: 4.7 oz.
    • H3: 5.6 oz.
    • 9MM: 6.9 oz.
    • AR-10: 4.7 oz

Includes:

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

Quick Instructions:

  • Insert polymer base with guide rod into the buffer tube.
  • Insert desired spring on the guide rod.
  • Insert the buffer over the spring.

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Armaspec Lifetime Warranty

  • All Armaspec products carry a LIFETIME WARRANTY and are warranted to be free from defects in material or workmanship.
  • Should there be a defect, we will repair or replace the product at our discretion at no cost to you.
  • Lifetime warranty does not apply to products sold as “blemished” or “manufacturer refurbished”.
  • You must have proof of purchase to initiate a WARRANTY claim.

Please email to rma@armaspec.com to request an RMA number.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 17 reviews
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(15)
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12%
(2)
J
Jason Barnett
Dont dont waste your money

Bought new. When insalled the rubber end is up against the small spring metal tip that holds the buffer in the tube and presses hard to where the rest of the rubber pushes out and locks the upper to the lower. I couldnt open it until i stick something in to push the buffer back. Wish I had my $ back. Need to have better design of harder rubber attachment or plastic. And its hard to remove unlike the old buffer and spring. It'd be easier to remove the stock to get it out. All around pain in the butt. And the pictures are after i had it out for a while. After storing in the same position...good luck opening the back side only.

Thank you for taking the time to leave a review. We apologize for any inconvenience you experienced with the Armaspec Sound Mitigation Buffer. Our team takes all feedback seriously and we will make sure to pass along your concerns to the manufacturer for consideration. In the meantime, please contact our customer service team for assistance with removing the buffer. We value your business and want to ensure your satisfaction with the products. Thank you.

J
Justin P.
SMB-308

This SMB for my Diamond Back DB10 is great. It took 60 rounds to work it in. I used some gum grease on it and it works awesome. Might take a little recoil down but paired with the Apollo Max muzzle break, it cuts .308 recoil in half. Super happy with it and thank you AT3 Tactical for a fast shipping and a great price.

Thank you for taking the time to leave a review for the Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3. We're glad to hear that it has been working well for you and that it has helped reduce recoil when paired with the Apollo Max muzzle break. We appreciate your support and hope you continue to enjoy your purchase.

R
Randy Ayers
Great option for my rifle l!

Easy to install very quiet and the rounds cycle just fine. Picked up the H2 on multiple recommendations from friends and could not be happier! Well worth the purchase!

Thank you for your positive review of our Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3! We are thrilled to hear that you found it easy to install and that it has greatly reduced the noise of your rifle. We also appreciate your trust in the H2 buffer weight based on recommendations from friends.

j
julio alequin
Cut the blowback by about half

Honestly thought it wouldn’t work but it does. Removed almost half the blow back on my 762 but this is the cheaper model. I believe the newer model will take away 3/4 of the blowback away

Thank you for taking the time to leave a review for our Armaspec Sound Mitigation Buffer. We're glad to hear that it has been able to reduce the blowback on your 762 by almost half. We appreciate your feedback and hope that our newer model will be able to further improve your shooting experience.

R
Ricky
Smooth Cycle

I have it loaded on Aero lower built 556 with 11.5 upper. This help make the AR cycle better. No issues have shot over 700 rds

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