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Reviews & Ratings for FAB Defense GL-CORE AR-15/M4 Skeleton Style Buttstock For Mil-Spec/Commercial Tubes — 135 reviews

(135 reviews)
FAB Defense GL-CORE AR-15/M4 Skeleton Style Buttstock For Mil-Spec/Commercial Tubes
FAB Defense GL-CORE AR-15/M4 Skeleton Style Buttstock For Mil-Spec/Commercial Tubes
As Low As $77.20
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Expert Review

Favorite Stock On Any Rifle

by Andrew, Gear Expert from WI, United States Written on April 4, 2024
This is by far my favorite stock to use on all of my ARs. Zero wobble and the ergonomics just fit my body and shooting stance better than any other stock on the market. Highly recommend this to anyone looking to upgrade their AR or building a new one.
Most Helpful Positive Review Magpul Who??
I have been a big fan of the magpul str stock for years due to its extra cheek weld, but they are still a little loose on a milspec buffer so I get some rattle. this has zero play. makes it a little hard to slide back and forth quickly. not a issue for me I set and forget. I'm sure will get a lit...
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Most Helpful Negative Review GL-Core buttstock w/cheek riser
Unfortunately this product let me down after I watched some good reviews on it and waited around two months to get it. Switching from the commercial to mil-spec buffer tube pieces literally look me around an hour of fighting with it and watching a tutorial on how to do it since it came with no instr...
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Nice touch

by Pogi mo, Verified Owner from SC, United States Written on April 19, 2026
Looks good and feels nice. Ergo is great but... For some reason the grip I got, doesn't have the beaver tail. It's just square in the back instead of running up towards the buffer tube. I still like it, just kind of looks funny if you look too hard at it.
Pros:
  • Feels great and grippy.
Cons:
  • Backside was square and looks a little funky
Would recommend: Yes
Was it helpful to you? Yes | No
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Best AR Buttstock

by Joe, Verified Owner from TN, United States Written on April 8, 2026
This buttstock was recommended to me by an instructor at a rifle course I took. It provides a great grip on my shoulder without digging in painfully. Easily rides high enough on the shoulder so I can bring the rifle to my eye without bending my head down.
Pros:
  • Design & quality
Cons:
  • None
Best Used for:
  • tactical shooting & self defense
Would recommend: Yes
Was it helpful to you? Yes | No
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fab core review

by Ryan Lawley, Verified Owner from PA, United States Written on April 2, 2026
Testing this against a stock m4 and a magpul buttstock i prefer the core...fits well when i am shooting with my plate carrier and without...light weight..no rattle compared to others. Rubber padding is well done. Would recommend to others especially cqb shooters!
Would recommend: Yes
Was it helpful to you? Yes | No
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Very heavy and missing parts

by Doug, from MI, United States Written on March 12, 2026
Missing parts and very heavy. I was able to return the product for free so that’s a plus.
Would recommend: No
Was it helpful to you? Yes | No
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Missing parts

by Doug, from MI, United States Written on March 4, 2026
Missing one of 2 commercial tube inserts. I need both as this is for a commercial tube.
Pros:
  • None
Cons:
  • Heavy
Would recommend: No
Was it helpful to you? Yes | No
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Looks good, feels good

by M, Verified Owner from MO, United States Written on December 12, 2025
Easy install, feels sturdy and padding is good. My only minor gripe is that it was not easy to adjust. It was very snug on the buffer tube, but this was resolved with a little oil on the tube. Now it moves freely.
Would recommend: Yes
Was it helpful to you? Yes | No
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Solid product!

by Mister 313rd, Verified Owner from MI, United States Written on October 28, 2025
I’ve been searching a while for a but stock for my AR build, the stock plastic M4 one is so ugly and uncomfortable. I have a commercial tube, so it’s not the easiest to find one that fits the bill. Thanks to you guys, I’ve found the perfect one.
Would recommend: Yes
Was it helpful to you? Yes | No
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works great.

by dta, Verified Owner from MI, United States Written on October 26, 2025
I needed a commercial buttstock with QD for my AR. This fit the bill just fine.
Would recommend: Yes
Was it helpful to you? Yes | No
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Fits perfect, looks great!

by James Trevino, Verified Owner from TX, United States Written on October 3, 2025
Just added the FAB Buttstock, and it looks better than expected. Great price, looks good and adjusts easily and smoothly
Would recommend: Yes
Was it helpful to you? Yes | No
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My New Favorite

by Badger, from TX, United States Written on August 10, 2025
For many years I purchased Magpul stocks and grips for my AR platforms.
About a year ago, I purchased the GL Core stock and the Gradus rubberized grip
For my AR. I have come to really like these stocks and grips, so much so that I now use them
on all my AR style platforms.
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.