New AR Stock from FAB Defense

Odds are good you have an AR-15 – or two, or three – in your gun safe. One of the great things about the popularity of the AR-15 is the not only the number of options out there for purchasing the gun itself but the phenomenal number of after-market parts. You certainly have options when it comes to after-market additions to your AR and when it comes to stocks those options are practically endless. But can your stocks do what the new FAB Defense stock does?F

FAB Defense now has the GL MAG (the full-length name listed on the company’s website is “M4 ‘Survival’ Buttstock w/Built-In Mag Carrier”). As you’ve probably deduced from the stock’s full-length name this is a stock with a feature that really will come in handy: a built-in mag well. The well is located on the underside of the stock immediately forward of the butt. It’s designed for a 10-round magazine and, in fact, ships with a single 10-round polymer mag. However, it can take standard 15 to 30 round mags as well. According to FAB Defense it’s compatible with all standard 5.56x45mm M16/M4/AR-15 magazines.

The GL MAG is 43mm wide, 130mm high, and 180mm long. Empty weight is 354 grams. In addition to classic black it’s being offered in olive green and flat dark earth.

FAB Defense bills their new stock as being the answer to being able to replace an empty magazine with a new one without raising your head from your rifle. It definitely merits a closer look.

MSRP isn’t listed but Brownell’s has it listed at $108.65. Take a look on FAB Defense’s site at

From FAB Defense:

  • Sleek design with no protruding parts, will not get caught on gear or webbing
  • Keeps all of the characteristics of the M4 buttstock, while incorporating a State of the Art magazine carrier
  • Positioned close by for convenient mag change , providing you with the edge you need
  • Incorporates a quick release button for swift clip change
  • Does not interfere or change ’ buttstock to shoulder’ positioning 
  • Integrated ambidextrous quick detach rear sling swivel connectors
  • Fits perfectly on both Mil-Spec and commercial tubes
  • Made from mil-spec reinforced polymer composite

TFB Staffer

TFB Staff, bringing you the latest gun news from around the world for a decade.


  • BattleshipGrey

    I thought this has been on the market for a while.

    • Carl

      It is. Someone’s just not doing the research to find that out

    • Nicks87

      Yep been around for a couple years I think.

    • All the Raindrops

      Katie A post. Lol

  • FLdeepdiver

    I have owned one for several years. It’s not that awesome with some wobble, but a great option for LEO’s that don’t typically carry extra mags for their patrol rifle on the duty belt. A twenty round pmag works well, but beyond that is impractical.

  • mike

    I ve had one on my m&p for yrs. Not only pmags fit. Surefire 60 rndrs do too, not that id keep one in it. I like the stock, and protruding mags do not get in the way. Kinda balances the weight out too. I believe they make them for ak’s too.

  • Nicholas C

    This is not new. Sold at Field and Stream for a year at least.

    • All the Raindrops

      I thinj it’s been out for at least 3 yrs maybe longer

  • Guys, I know you take money from manufacturers and distributors for fluff pieces. I get it, something’s got to pay the bills. No harm, no foul.

    But let’s not call something “new” when it’s not even remotely “new”. Is that really such a hard thing to ask for? Yes, the press release says it’s new… the press release is also like two years old.

  • Tyler McCommon

    So adds weight, expensive and rather unneeded? But perhaps if you’re using the AR for home defense you’ve got 60rds ready to go on your AR.

    • iksnilol

      Eh, just couple a pair of 40 rounders and you’re set.

  • iksnilol

    Standard 15 rounders?

    • All the Raindrops


  • Phil Hsueh

    Does it come with an option to fit a bullet button? Because, you know in CA we need a bullet button, never mind that it’s in the stock, the antis would probably think that there’s a new secondary fee mechanism back there that allows the rifle to feed from a stock mounted magazine. Oops, I probably shouldn’t have wrote that because some idiot law maker here in CA will think that’s actually true and either actually require a bullet button on this stock or ban them outright actually thinking that it would actually allow someone to have 20 rounds at the ready instead of just 10.

  • Another winner!

    I think Katie A. is a troll. I don’t think I’ve ever seen a quality post from her. She copies and pastes a company’s “press release” and announces an old product, sometimes several years old, as a brand new one. There is no way anyone in the shooting world could think this stock is new. I think this is a long game troll joke or something. There is no way this is serious.

    • All the Raindrops

      Yep. There is no way anyone in the shooting world would take this stock seriously.

  • DanGoodShot

    This stock has been on the market for a few years now. Amazon has been selling them for at least the past 4 years that I know of.

  • Mark M

    I got one shipped to me by accident trying to buy a flashlight for my girlfriend (go figure). I installed of curiosity. Overall impression was iffy. It is a little heavy and a pain to get on and off. The magazine doesn’t really interfere and I think it’s a clever idea, I just don’t have a need. I could definitely see an advantage for a patrol officer, or maybe a truck gun. It just didn’t solve any problems for me.

  • Rhesus

    The even comes in a version with short AK mag :cD

  • jerry young

    I’ve see this before and there is also one that holds a small handgun but I’ don’t know who manufactures that one, both have been out for more than a year.

  • Timothy G. Yan

    New? I have this one for 3 years.

    It comes with a cheap polymer 10-round magazine but you could switch out to any AR magazine.

  • Cymond

    Not only is this year’s old, it was covered on TFB.
    The reason things like this exist is they’re required to keep an empty magazine well in Israel. Hence, they have a lot of products for carrying a magazine on the rifle so that it’s unloaded but easily accessible.

  • SD

    Don’t ever buy anything from Mako. They’ve screwed many of us on Gen 1 ELander magazines that do not seat properly, and still claim they are milspec and the problem lies with our AR’s.