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Guntec USA AR-10 Mil-Spec Buffer Tube Set, .308 Cal
As Low As $53.99 Save Up to 17%
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Most Helpful Positive Review GUNTEC USA AR-10 Mil-Spec Buffer Tube Set,.308 Cal
The Buffer Tube set fit my AR build perfectly. Would recommend to anyone building a 308 AR. Fit the mil-spec stock that I'd selected perfectly. Additionally it fit the lower and upper that i'd selected. At the range the system worked perfectly.
Most Helpful Negative Review Like a lot of other reviewers say: Just don't buy Guntec
I have not had a good experience with Guntec products. It is all cheap, foreign made junk. While the price is appealing, remember, you get what you pay for. Find something else on sale and you will be happier in the long run.
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Nice buffer set up decent weight

by D, Verified Owner from PA, United States Written on October 22, 2025
Decent buffer going to buy different weight for more setup options, my only complaint is I wish the color was either raw or polished it's looks dull bead blasted but the description is on point the color complaint is on me.
Pros:
  • Decent price and quality
Cons:
  • None
Best Used for:
  • Ar 10 .308
Would recommend: Yes
Was it helpful to you? Yes | No

Nice quality

by Dave, Verified Owner from WV, United States Written on July 18, 2025
Put this on a aero m5 lower and the look and feel is real nice the buffer and spring are quality as well.
Would recommend: Yes
Was it helpful to you? Yes | No

great servuce

by Daniel D, Verified Owner from FL, United States Written on May 30, 2025
Once again optics planet delivers great service and great products!! I highly recommend using optics planet!!
Would recommend: Yes
Was it helpful to you? Yes | No

Buyer beware

by PATRICK HENNIGAN, Verified Owner from FL, United States Written on December 9, 2024
This is junk. The buffer is 1 piece, no inserts to prevent bolt carrier bounce. Will not cycle.
Would recommend: No
Was it helpful to you? Yes | No

Great product

by C bailey, Verified Owner from TN, United States Written on January 11, 2024
Product is great good quality make sure you don’t forget to buy the spring and plastic keeper that go in the lower to hold spring and buffer in
Would recommend: Yes
Was it helpful to you? Yes | No

Guntec USA AR-10 Mil-Spec Buffer Tube Set, .308 Cal

by Mike, Verified Owner from WA, United States Written on April 23, 2023
This unit has a 3.8oz buffer. It would not cycle my rifle. I had to make purchase of a 5.0oz buffer and use an Aero Spring to make it go like it should. This might have worked if the buffer were heavier.
Would recommend: No
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Super quality and helps my 6.5 Creedmoor stay fed!!

by One Eyed Willy, Verified Owner from SC, United States Written on July 24, 2022
High quality materials and finish. The spring is of superb quality and got the strength it needs to handle the cycling my blaster puts out. I'll be buying these for my rigs from now on. Thank you for the high-quality product and serving the community!!
Pros:
  • rugged
  • High quality
  • Finish
  • Function
Cons:
  • I need more
Best Used for:
  • Battle rifle
Would recommend: Yes
Was it helpful to you? Yes | No

it works for what i need

by Jeremiah Davis, Verified Owner from TX, United States Written on March 11, 2021
Castle nut was extremely tight, it had to be pried with a flathead when test fitted to get the tube to cover the retainer pin. There is no cut out for the retainer pin either but, that is jot a deal breaker
Would recommend: Yes
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Just what I needed!

by Pistolero, from KY, United States Written on September 9, 2020
Was building an AR10 recently and discovered I need a buffer tube and spring to complete it. Optics Planet had just what I need. AR parts have become scarce recently during the Wuhan China virus. The price was fair and shipping fast.
Pros:
  • quality, price, shipping
Cons:
  • None
Best Used for:
  • custom AR 10 build
Would recommend: Yes
3 of 5 found the following review helpful.
Was it helpful to you? Yes | No

Economical AR-308 buffer tube assy mil spec

by Toolman1JB2, from TX, United States Written on July 1, 2018
A bit shorter than factory dpms but works fine,! Great for replacing the fixed stock with 6 position stocks, this option lets you pick a lot of different styles of adjustable stock not have to choose the same style but works well with all mil spec stocks not commercial size tube stocks
Pros:
  • Price
Cons:
  • Shorter
Best Used for:
  • AR 308 builds
Would recommend: Yes
1 of 2 found the following review helpful.
Was it helpful to you? Yes | No
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