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FAB Defense GL CORE MAG CP - M4 Survival Buttstock w/ Built-in Mag Carrier
As Low As $50.49 Save Up to 64%
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Most Helpful Positive Review Fixes issues with the GL-MAG
This stock fixes the rattle issue that the GL-MAG had with mil-spec buffer tubes while also cutting down on the bulk. It comes with 2 sets of inserts (one set for mil-spec and one for commercial) to make sure it has a tight, no-rattle fit. The back also allows for a good support hand grip when the r...
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Most Helpful Negative Review Magazine fitment
So, one should know that if you purchase this buttstock, you will either modify all the metallic mags you intend to use with it, or e limited to polymer mags. Promags do capture into the catch, but no metallic mags do. For 223/556, this is not necessarily an issue, as polymer mags are plentiful. ...
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nice stock

by Tim, Verified Owner from AR, United States Written on April 24, 2026
Pretty nice stock, mounts solid, no wobble with included spacers on mil spec tube, came with the magazine thats locks tight in stock. The color doesn't match magpul fde cerakote, but its closer than most. Cant beat the "sale" price.
Would recommend: Yes
Was it helpful to you? Yes | No

great quality

by Chef, Verified Owner from CO, United States Written on April 10, 2026
Super sturdy love the feel and the extra mag space is genius
Pros:
  • well built
  • Sturdy
  • extra mag space
Cons:
  • slightly heavy
Best Used for:
  • 556 rifle
Would recommend: Yes
Was it helpful to you? Yes | No

licky and chewy

by Roy, Verified Owner from MT, United States Written on March 14, 2026
This fills a nitch I have. It meets my ocd needs. Comes with everything you need for both style buffer tubes.
Pros:
  • well built
  • I like everything about it
Cons:
  • Not yet discovered any!
Best Used for:
  • Tacti-cool
Would recommend: Yes
Was it helpful to you? Yes | No

Probably the best stock on the market IMO

by Spaghetti, from FL, United States Written on February 14, 2026
I like having extra features, and an extra magazine is probably one of the best options. Plus the butt-pad is rubbery �
Pros:
  • extra ammo
  • easy to install
Cons:
  • None
Best Used for:
  • Speed reloads
Would recommend: Yes
Was it helpful to you? Yes | No

Awesome Addition to my setup

by El, Verified Owner from MN, United States Written on January 31, 2026
Got a great deal on this, well worth the $99 even before free 2-day air. This stock will hold probably just about any magazine made. Fits my magpul d-60 and schmeisser 60rounder for sure. Only regret is not buying 2 of them, heh. Have no fear, I will be back for the OD Green version
Would recommend: Yes
Was it helpful to you? Yes | No

Awesome Addition

by El, Verified Owner from MN, United States Written on January 27, 2026
Look no further than this baby right here if you're in the market for a new favorite stock. I lucked out and caught it with free 2-day air. Well worth the $100 even without that. Fits Magpul D-60 as well as Schmeisser 60 round quad stack. Balances way more nicely than you'd think and looks badass in the process. My only regret is not buying 2. Have no fear I will be back for the OD Green. Thanks for the awesome upgrade!
Pros:
  • Fits any ar15 magazine you can imagine
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Excellent quality

by JR, Verified Owner from OH, United States Written on January 14, 2026
I put this on an Alexander Arms 17 HMR and stuck their mag block in the stock and slightly modified the mag catch; it works great.
Pros:
  • Excellent design
Cons:
  • Have received 3 without the mag catch
Would recommend: Yes
Was it helpful to you? Yes | No

Handy mag holder

by Chilly, Verified Owner from TX, United States Written on January 3, 2026
Great fit! Easy quick change at the range no fumbling for mags in pouches
Pros:
  • Great fit easy Chang out
Cons:
  • None
Best Used for:
  • Rapid fire range shooting
Would recommend: Yes
Was it helpful to you? Yes | No

Bought for cool factor originally

by Johnny, Verified Owner from TN, United States Written on December 18, 2025
This is my second time purchasing this stock for good reason. My reasoning for not giving 5 stars is cost and it’s not the sleekest design if you’re looking for a CQB or lighter stock. Not super heavy with the magazine loaded and it balances perfectly on one of my 18” builds. Solid design and one of a kind. Have a bunch of different stocks on builds and for everything 16” and up I would recommend using this.
Pros:
  • None
Cons:
  • price
Would recommend: Yes
Was it helpful to you? Yes | No

Looks great

by Dave, Verified Owner from TN, United States Written on November 25, 2025
Joy sure why this is discontinued it works great… as Clint smith says for home defense people tend to fight with what is on or in the gun and I just doubled my ammo with this stock
Would recommend: Yes
Was it helpful to you? Yes | No
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