MPN: APRH100158C


  • Mil-Spec 6-position buffer tube
  • Accepts Mil-Spec buttstocks
  • Made in the U.S.A.


  • Material: 7075 T6 aluminum
  • Weight:
    • Buffer tube: 3.65 oz.
    • Buffer: 3.8 oz.
  • Finish: Hard coat anodized


  • AR-10


  • 1x Aero Precision Mil-Spec 6-position carbine buffer tube
  • 1x .308 Carbine Spring
  • 1x .308 Carbine Buffer
  • 1x Locknut (Castle Nut)
  • 1x End Plate


When you get ready to work on that .308 carbine build that you have been itching to start, you’re going to need some parts. The AR-10 platform has not enjoyed the same standardization as its AR-15 offshoot and the M5 is no exception. You can’t just slap in any old AR-10 buffer tube kit and expect that rifle to run right. When it comes to cycling the action properly, you need to get your hands on an Aero .308 carbine buffer kit and get ready to build it right.

Different Strokes

The Aero Precision M5 .308 carbine requires a different cycle length for its bolt carrier group in order for it to properly function. This is where the Aero .308 carbine buffer kit comes into action. If you happen to grab a rifle length AR-10 buffer, then get ready for some feeding issues. A .308 carbine uses a shorter buffer and spring to accommodate the different cycle length of the action. When you install the right .308 carbine buffer tube kit it alleviates this problem.

Keep It Simple, Keep It All the Same

If you happen to be a professional armorer then you can probably take a pile of parts and build a reliable weapon. However, it’s usually the safest choice for us mere mortals to keep it simple. If you get your .308 carbine buffer tube kit, receivers, and barrel all from the same manufacturer it’s a good bet that it will all work together. The furniture doesn’t matter as much as all of those critical, naughty bits that have to play well together. So, get quality parts, pay attention, and have fun building.

Have a question?

Ask an Expert

Reviews (6)

  • Buffer Tube Kit

    Posted by Victor Morgan on 15th May 2022

    It fits and works, just like the advertisement says, other kits have cycling problems. A different 308 buffer tube kit that I bought from a another company would not allow the bcg to open completely due too, to many spring coils. Good Job Aero !!!!

  • Fit

    Posted by Eddie on 6th Dec 2020

    Worked great and fit perfectly on my lower.

  • Aero precision m5 buffer tube assy for 308

    Posted by Ernest Richard Revis on 3rd Feb 2020

    Great quality.

Frequently Bought Together

  • This Item: Aero Precision M5 .308 Carbine Buffer Tube Kit
    MSRP: $69.99
    (You save $10.04 )

Total Price:

Add to Cart

Customers Also Viewed