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FM Products Mike-9 RMB Heavy Buffer
As Low As $51.99 Save Up to 13%
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Most Helpful Positive Review works great
The the extended buffer tube and the buffer it shoots really soft
Most Helpful Negative Review Weight is only 9.4oz
The buffer only weighs 9.4oz. it says it's 11 oz.. it requires a A5 buffer tube and spring.
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Heavy buffer (9.51oz)

by Big Balla, Verified Owner from ME, United States Written on July 12, 2026
Like other reviews are saying, this product is NOT 11oz. I got it for my 9mm expecting 9.5oz so it is perfect. Also like the other reviews say, there's a silver pin that holds the front part of the buffer in place which isn't a problem once it's in the gun. It helped slow my cycle speed so my PMAGs don't strip rounds anymore. 400 rounds in (FRT mode) and it's running like a champ.

Now the buffer tube is something I haven't seen anyone talk about so I'll let you know. It's amazing. I have another buffer tube from KAK that is amazing as well but doesn't have the buffer retainer pin cutout. If you're looking for that then you've found it. This thing has the bonus of being cheap cost AND comes with the feature.

Things I was looking for:
- 11oz buffer (if true, it would've been the heaviest buffer I know of)
- Spare A5 buffer tube (cheap with bundle)
- Dead Blow system

Things I would change:
- Captive pin on front spring cap
- Offer a true 11oz dead blow or adjacent buffer weight (for 45 acp / 10mm)

When the downsides of a product are all preference based that's when you know it's a good thing. You won't be disappointed with it if you're looking for a heavy buffer replacement for PCCs. It's my first FM product and i WILL be back for more. Please make a true 11oz �
Pros:
  • Dead blow system
  • 9.5oz PCC buffer (Heavy)
  • Buffer Retainer cutout
  • Cheapest A5 bundle out there
Cons:
  • Description states 11oz (could be misleading)
Best Used for:
  • 9mm +P 124 Grain
  • FRT
  • Direct Blowback
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Buffer weight

by Don, Verified Owner from OR, United States Written on July 3, 2026
Missing the roll pin in the spring cap not happy about that
Pros:
  • None
Cons:
  • No quality control
Would recommend: No
Was it helpful to you? Yes | No

Buffer weight

by Don, Verified Owner from OR, United States Written on June 9, 2026
Has a pin instead of a roll pin holding the spring cap on the pin slides back and forth and will gouge my buffer tube
Pros:
  • ?
Cons:
  • No quality controle
Would recommend: No
2 of 3 found the following review helpful.
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Buffer weight

by Don, Verified Owner from OR, United States Written on May 21, 2026
Looks good but not 11oz and pin at top holding spring in place loose slips out
Pros:
  • none - does not nor will ever work
Cons:
  • Under weight loose pin
Would recommend: No
3 of 6 found the following review helpful.
Was it helpful to you? Yes | No
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Last updated 2026-05-22 UTC.