Expo Arms .308 Heavy Carbine Buffer - 5.3 oz

Manufactured by Expo Arms
Manufactured by Expo Arms
1 Review

In Stock

NOTE: Limit 3 per household. Quantities exceeding 3 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 7 business days. FFL orders take approximately 20 business days or less if you can provide us an actively receiving FFL location.



The Expo Arms .308 Heavy Carbine Buffer is just what you need for your next AR-10 build. It is constructed from 4140 steel with a blue rubber bumper. When combined with an AR-10 carbine length recoil spring, this 5.3 ounce buffer offers exceptional reliability. The heavier weight is great for tuning recoil on an overgassed rifle or simply using heavier grain ammo. Designed for use with Mil-Spec or commercial carbine buffer tubes.

  • Heavy Duty 4140 steel body
  • Tungsten cores
  • For use with carbine length receiver extensions
  • Blue rubber bumper
  • Recommended for use with modified AR-10 buffer springs
  • 2.5”
  • 5.3 oz.

Expo Arms offers top-quality MIL-SPEC AR-15 components at rock bottom prices. Made in the U.S.A. and covered by Expo’s Limited Lifetime Warranty against manufacturer defects, material or workmanship problems, and even normal wear and tear.
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BrandExpo Arms
Weight5.3 oz.

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

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Heavy buffer & spring helps, but not 100%.

by -

I bought this & the extra heavy sprinco Orange buffer spring because the .308 exhibited traits of being over-gassed, the most obvious a 2:00 o'clock ejection pattern. I was hoping this $70 worth of parts would put the empty brass at 4:00 o'clock but no. I'm at 3:00 o'clock consistently. So I may yet spend more money on a new gas block too. PA is fast to fulfill orders and ship out. I got the parts before the charge officially cleared my bank account. This is a well manufactured piece of kit. Would buy again for a different build