Aero Precision AR-15 Carbine Buffer Kit - MIL-SPEC

Manufactured by Aero Precision
SKU: APRH100151
MPN: APRH100151
Manufactured by Aero Precision
12 Reviews

In Stock

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The Aero Precision AR-15 Carbine Buffer Kit is an essential component for any standard rifle build, providing exceptional quality and reliability. Manufactured in the USA, this kit ensures consistent performance and durability. This kit includes a MIL-SPEC diameter, 6-position receiver extension made from high-grade 7075-T6 aluminum, which guarantees a precise fit and optimal functionality. The receiver extension is designed to accommodate various shooting positions, allowing you to customize the length of pull for enhanced comfort and control.


  • MIL-SPEC 6-position receiver extension machined from 7075-T6 aluminum
  • Standard carbine recoil buffer and buffer spring
  • End plate and castle nut included
  • Made in the USA
  • Weight: 9.8 oz
  • Buttstock not included.
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BrandAero Precision
TypeStock Hardware Kit
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

12 reviews


Another Out of spec aero part

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Out of spec not happy with finish or fit at all. I don't know what's going on at aero lately

Never disappointed by Aero


Recommend works like it should I have two of these's kits for about two years with no problems.

Totally Disappointed


I've been a fan of Aero Precision stripped lowers and uppers and decided to get this kit for my new build thinking it since it's Aero it should be good. Not so. The finish on the tube both interior and exterior was really rough. Part of the threads got stripped from the end plate while I was torquing down the castle nut which caused the tube to rotate as I was torquing. I finally managed to assemble it straight but then found out when I put on my magpul stock that it can't fully collapse because the threads are oversized. I don't know if this one was not properly machined but I'll stick with only getting receivers made by Aero.

tighter fit


Ill have to agree but disagree with the other reviews. Ive used a dozen other brands tube kits and this one by far is the best fitting. Yes the finish is a more textured but its done well. Its the best fitting tube Ive used as there is literally no extra space and fits quite snug on a stock.


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Everything was as it should be. I was pleased with the fit and finish. Would recommend and buy again.

Like a charm!

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Worked great in my Aero Precision 223 Wylde Build. I used a 18 inch Ballistic Advantage Heavy Fluted SPR barrel with a rifle length gas system. I upgraded the buffer to the H2. everything works great!

My go to buffer tube

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I have used 4 of these kits so far without disappointment. For a good quality budget rifle they're perfect.

Same Two Part Numbers. Two Different Buffer Tubes. Bad Quality Control.

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I ordered two of these buffer kits and upon opening the packages, I found that both buffer tubes were machined differently. One seemed fairly standard with a protruding lip that holds down the spring and detent.

The other had no lip and had awful machining marks on it. After checking the packages, both kits had the same part numbers. I installed both kits today and had to file down part of the poorly machined tube. After a lot of effort, I was able to get both kits installed correctly.

I just don't understand how a company like Aero Precision can have such horrible quality control.

From PA: We're sorry that you had this issue. We'd have been happy to swap out the bad one for you.

Missing castle nut

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Missing Castle nut and came with 2 end plates. QC not doing so well on my order.

Great product, good service

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Aero makes really good high quality products.