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ODIN Works 9mm Adjustable Buffer
$79.00 $75.05 Save $3.95
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Most Helpful Positive Review Easily adjustable
Purchased this buffer for my 9mm carbine build. While I haven't completed this build yet, the feature of "front loading" the buffer to adjust the weight will be a game changer. it can be easily be adjusted at the range. Comes with the necessary tools to make changes. Hats off to Odin for a great design Hats off to Optics Planet for a great price.
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nice adjustable buffer

by Stallwle, Verified Owner from GA, United States Written on November 7, 2025
very nice part, set screw to lock down the main cap screw, nice asst of Weights for all kinds of adjustment, and was perfect for my AR9 build and get it to Hold open on last round, the KAV 7.5 was bit to heavy and with three tungsten weights my scale said 7.3 for the Odin works one
Pros:
  • good value
  • Adjustability
  • Qulaity
Cons:
  • no Extra spare rubber spacers
Best Used for:
  • 9mm AR builds
Would recommend: Yes
Was it helpful to you? Yes | No

Searching for that perfect recoil pulse

by Greg Weems, Verified Owner from MS, United States Written on September 26, 2025
The Odin Works 9mm Buffer seems to work well as expected in my Freedom Ordnance FX9 project so far.

With that and the Midwest Industries muzzle brake, the platform shoots very flat and throws brass at a consistent range of 4 - 5 O’clock at a good distance.

Next up will be to experiment with a bit heavier buffer spring to see just how tuned it can get.
Would recommend: Yes
Was it helpful to you? Yes | No

Odin 9mm Adjustable Buffer

by BrassAngel85, Verified Owner from NC, United States Written on August 19, 2025
Makes it easy to dial in proper bolt carrier speed and operation of AR9. Love these and have multiple for all 3 platforms. AR9, AR15, & AR10. Definitely a solid purchase for optimizing your weapon.
Would recommend: Yes
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ODIN adjustable buffer allows you to tune your firearm

by Sandy Ranger, Verified Owner from ID, United States Written on August 5, 2025
I use the ODIN 9mm adjustable buffer to tune my builds to the load used. I have 9mm's with barrels from 5 inches to 18 inches. Some are for subsonic loads, some are for reduced loads, and some are for full power loads. They are supplied with many weights included to handle most situations. With the ODIN all are tuned to the proper recoil resistance. They also work great in other type AR's.
Would recommend: Yes
1 of 1 found the following review helpful.
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Best Heavyweight Buffer for AR10 with A5 Buffer Tube

by Seb, Verified Owner from UT, United States Written on July 31, 2025
This worked perfectly in my PSA Gen3 PA10 with an RE-AT Vltor tube to tune it to perfection. Just make sure to loctite the screws once you set it up the way you want it! They will back out on you while shooting eventually.
Would recommend: Yes
1 of 2 found the following review helpful.
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must have for frequent builder

by Sdt, Verified Owner from MS, United States Written on June 22, 2025
If you do multiple builds with multiple calibers across deferent platforms, this is an essential item. Tuning rifles from 9mm to 300wsm utilizing carbine and a5 buffer tube combinations this is what you need to get the cycling and recoil impulse perfect for your project. This thing is built like an up armored tank and optics planet had the best price anywhere.
Would recommend: Yes
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if you have a folder read below...

by Anon S. Treview, Verified Owner from PA, United States Written on May 21, 2025
I use this Odinworks adjustable buffer on an ar9 PCC I've been building.. if you're familiar with ar9 BCGs then you'll know some of them have a weight pinned in at the rear of the bolt.. and if you want to put a folding adapter (i used the law tactical) then you'll need to un-pin that weight, therefore losing some of the reciprocating mass.. Other reviews have mentioned the 23 grams minimum total weight for BCG and Buffer, I'm here to mention this WILL help get back to that magic number if you have to remove the Bolt weight for a Law Tactical folder. My PCC now cycles and feeds reliably AND has a good cyclic rate for those times you may want to be super safe about things ...

I also recommend a little thread lock for all the set screws (once you have your preferred weight adjustments tuned in)
Would recommend: Yes
1 of 1 found the following review helpful.
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Great for the price

by clutch, Verified Owner from PA, United States Written on April 16, 2025
I really enjoy the quality for the price, great products !!!!
Would recommend: Yes
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ODIN Works 7.4oz Adjustable Buffer

by mrpointy97, Verified Owner from NC, United States Written on December 18, 2024
The adjustability let me find tune an AR nine platform for minimal recoil and back pressure.
Would recommend: Yes
1 of 1 found the following review helpful.
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adjustable bufer

by WL, Verified Owner from CA, United States Written on June 29, 2024
Looks like good quality. I love the fact weights can changed and don’t have to buy multiple buffers to find out what works best.
Would recommend: Yes
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