KAK Industry AR15 9MM Carbine Buffer Extended 8 oz

(22 reviews)
Current Stock:
Adding to cart… The item has been added


Extended length for proper bolt catch overtravel  

Length- 4"

Weight- 8oz

Finish– Phosphate

Properly Heat Treated

Bumper color- Red

Compatible with standard buffer tube spring

For use with 9MM Pistol Caliber AR15 firearms utilizing a one-piece BCG


Buffer Weight:
9MM Carbine Extended


  • 4
    Works awesome!

    Posted by Joshua on October 19, 2023

    No issues with it, and now no need for a buffer spacer

  • 5
    Seems good

    Posted by Aaron on February 17, 2022

    I think it will be a very solid buffer, I haven’t used it yet.

  • 4
    Good for a PSA AR-V

    Posted by Dkamm on September 22, 2021

    Put in a 10.5” PSA AR-V with standard buffer spring (uses CZ Scorpion type mags). Runs good. No failures. Bolt holds open fine with both PSA and Magpul mags. Very minimally affects felt recoil from the heavy bolt and direct blow back system but does it’s job at an affordable price in reducing the bolt travel. Very solid construction.

  • 5
    good product

    Posted by Casey on April 26, 2021

    I have bought two of these now, I like that they are longer then a regular buffer and you don't have to have a spacer or stack quarters in your buffer tube so the bolt catch isn.t hit so hard when it locks back. I have one in a polymer lower and it takes a little stress of the lower where the Buffer tube screws in by slowing the bolt a bit.

  • 5
    The perfect 9mm build buffer

    Posted by Jon on August 6, 2020

    The best buffet for a 9mm build. Used standard carbine spring and I did not have any FTF/FTE at all. Traveled back to lock up bolt hold open latch every time. I am extremely pleased with this purchase. Took a long time researching, the 8oz extended is the way to go.

  • 4
    A good product but doesnt work with some glock magazine adapters

    Posted by Ian on November 6, 2019

    That is a great product. But 9mm ar15s can be very finicky. It didnt work well with a stern defence glock mag adapter I believe because the extractor is positioned where it doesn't have enough time to eject fully before the bolt closes. Switched to the kak 5.5 oz 9mm buffer which is 100% reliable for my build.

  • 5
    Exactly what I needed for my build

    Posted by Mixted on July 23, 2019

    Was in the process of building an ar9, and could not decide what buffer I needed, I tried using the standard ar buffer weight and it felt like it was going to launch it though the buffer tube and into my shoulder. A friend recommended I look at this one so I picked it up and could not be happier with it's performance.

  • 5
    Badazz buffer

    Posted by Judd on February 28, 2019

    Hi there. I recently built an AR in .45acp. I used this 8oz. Buffer and it cycles so smoothly.

  • 5
    9mm buffer

    Posted by Russ on February 11, 2018

    Glad buffer is of a different color, makes it easy too tell it apart from my 5.56 buffers