FAB Defense · AR-15 / M4 / M16

FAB Defense Ultimate AR-15 Upgrade Kit

  • GL-CORE M Stock + 10-Round Mag
  • GRADUS Pistol Grip
  • PTK-M Pointing Grip
  • VTS-M Hand Stop
  • RBS Rear Flip-Up Sight
  • FBS Front Flip-Up Sight
  • 3 × ULTIMAG G2 30-Round Mags
Color

$280.95$280.60 for the five parts alone

+ 3 ULTIMAG G2 30-round mags in the box

Ships to US addresses only.

Everything in the Box

Five FAB Defense upgrades plus three mags. Here's what each one does on your rifle.

Where each kit part goes on your AR-15: stock, grip, pointing grip, hand stop, sights and magazine
Where each kit part goes on your AR-15: stock, grip, pointing grip, hand stop, sights and magazine
  • GL-CORE M Stock + 10-Round Mag

    GL-CORE M Stock + 10-Round Mag

    Slides onto mil-spec or commercial buffer tubes with no rattle. A concealed carrier in the stock holds a spare 10-round ULTIMAG, included.

    Alone: $107.95View part →
  • GRADUS Pistol Grip

    GRADUS Pistol Grip

    A 15° reduced grip angle puts your wrist in a more natural position, especially with a shorter stock setting.

    Alone: $23.95View part →
  • PTK-M Pointing Grip

    PTK-M Pointing Grip

    An angled M-LOK pointing grip that gives your support hand the same position every time.

    Alone: $41.95View part →
  • VTS-M Hand Stop

    VTS-M Hand Stop

    An M-LOK hand stop that sits in front of your support hand and pairs with the PTK.

    Alone: $19.95View part →
  • RBS Rear Flip-Up Sight

    RBS Rear Flip-Up Sight

    Rear backup sight for the Picatinny top rail. It stays folded until your optic goes down.

    Alone: $52.35View part →
  • FBS Front Flip-Up Sight

    FBS Front Flip-Up Sight

    The matching front sight, so your backup irons are ready when you need them.

    Alone: $34.45View part →
  • 3 × ULTIMAG G2 30-Round Mags

    3 × ULTIMAG G2 30-Round Mags

    Polymer 5.56 / .223 magazines, on top of the 10-rounder that rides in the stock.

    In the kit

Kit vs. Buying Separately

Same FAB Defense parts. Live prices from our store.

GL-CORE M Stock + 10-Round Mag$107.95
GRADUS Pistol Grip$23.95
PTK-M Pointing Grip$41.95
VTS-M Hand Stop$19.95
RBS Rear Flip-Up Sight$52.35
FBS Front Flip-Up Sight$34.45
Separately$280.60
The kit$280.95
+ 3 × ULTIMAG G2 30-Round MagsIn the kit

Will It Fit My AR?

Check these before you order.

  • ✓ Buffer tube: mil-spec or commercial. The GL-CORE M fits both.

  • ✓ M-LOK handguard: needed for the PTK-M and VTS-M.

  • ✓ Flat-top Picatinny rail: for the flip-up sights.

  • Shipping: US addresses only.

Install Guide

Basic tools, no gunsmith. Unload the rifle and check it first.

  1. StockPull the adjustment lever and slide the GL-CORE M onto your buffer tube until it locks in a position.
  2. Pistol gripRemove the grip screw, swap in the GRADUS and keep the selector spring and detent in place.
  3. ForegripMount the PTK-M and VTS-M in your M-LOK slots and tighten the T-nuts.
  4. SightsClamp the RBS on the rear of the top rail and the FBS up front, then zero them with your optic.
  5. MagazinesLoad the ULTIMAGs and park the 10-rounder in the stock carrier.

Watch It

Official FAB Defense videos.

Read the guide: AR-15 Upgrade Kit Explained →

Questions

Does it fit my AR-15?

Yes, if it has a mil-spec or commercial buffer tube. The foregrip parts need an M-LOK handguard and the sights need a flat-top Picatinny rail.

Is the 10-round magazine included?

Yes. It rides in the GL-CORE M stock, on top of the three ULTIMAG G2 30-round magazines.

Why is the kit a better deal?

The five parts alone (stock with its 10-round mag, grip, pointing grip, hand stop and both sights) cost about the same as the whole kit, and the kit adds three ULTIMAG G2 30-round mags.

Which colors are available?

Black and Tan.

Do I need a gunsmith?

No. Basic tools are enough. Unload the rifle and check that it is clear before you start.

Do you ship outside the US?

No. This kit ships to US addresses only.

Ultimate AR-15 Kit · $280.95