AT3™ SPEAR M-LOK Handguard for AR-15 – 9, 12, & 15 inch Lengths

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AT3 M-LOK Rail Covers - 3-Pack - Retro - Black

3-Pack AT3 M-LOK Rail Cover - Flag - Black


AT3 M-LOK Rail Covers - 3-Pack - Retro - Black

AT3 M-LOK Rail Covers – Retro & Old Glory Design – 2 Colors Available

AT3 M-LOK Rail Covers - 3-Pack - Retro - Black

3-Pack AT3 M-LOK Rail Cover - Retro - Flat Dark Earth


AT3 M-LOK Rail Covers - 3-Pack - Retro - Black

AT3 M-LOK Rail Covers – Retro & Old Glory Design – 2 Colors Available

The AT3 SPEAR™ is our best, most secure handguard. Simple to install, lightweight, and easy on the wallet.

The slim free-float design enhances accuracy while minimizing the weight of your rifle. M-LOK attachment slots and included rail section provide unlimited options for accessorizing your build. And with an available Billet Upper to perfectly match the slim profile, the SPEAR (Slim Profile Ergonomic Adjustable Rail) creates a unique look to set your rifle apart.

With 9″, 12”, or 15” lengths available, the SPEAR handguard is ideal for customizing your next AR-15 build or upgrading an existing rifle. If you’re starting from a stock rifle, make sure you purchase a Low Profile Gas Block with the handguard.

Lightweight & Durable

  • Slim and lightweight M-LOK design, with attachment, points at the 3, 6, & 9 o’clock positions and lightened Picatinny rail at the 12 o’clock position
  • Durable 6061 aircraft aluminum alloy construction – designed to take a beating
  • Picatinny top rail perfectly aligns with AR-15 flat-top upper receivers, both forged and our AT3 Billet Upper
  • Handguard uses screws to clamp around the barrel nut, with anti-rotation tabs and anti-slip screws that ensure a rock-solid lockup

Easy Install Rock Solid Clamp and Lock MountingAnti Rotation Tabs for Secure Fit on Both Forged and AT3 Billet Uppers

Easy to Install

  • Installs clean and secure with only a few simple steps – all you’ll need is a torque wrench, vise block, and vise. Click here to view our instructions.
  • Perfect for assembling a new build or upgrading an existing rifle – it’s compatible with most upper receivers on the market
  • Once you’ve got it installed, you’ll have plenty of room for M-LOK accessories and adapters
  • Seriously, it’s easy. Check out our video below for a guide on the complete installation.

Vented Design - Lightweight and reduces heatM-LOK and Picatinny Rails Hold All Your Accessories

Exceptional Fit and Finish

  • Durable matte-black anodized finish resists scratches and provides an attractive surface that matches the rest of your build
  • Vented top rail reduces weight and dissipates heat from shooting
  • Finger grooves down the length of the handguard provide a more ergonomic hold and a unique look
  • Fully dehorned and free of burrs and other sharp snag points
  • Proudly made in the USA
  • Backed by the AT3 Lifetime Warranty

Smooth Machining - No Sharp EdgesAT3 SPEAR M-LOK AR 15 Free Float Handguard proudly made in the USA

More Information

Full kit – includes all mounting hardware, plus one M-LOK 5-Slot Rail section and barrel nut wrench.

Full Kit - Rail, Hardware, and Tools

Note: most rifle setups will require the use of a low profile gas block that sits under the handguard.

Included in the box:

Handguard with aluminum barrel nut and all mounting hardware, one 5-slot M-LOK to-Picatinny rail, hex wrenches for handguard and rail sections, and barrel nut wrench.


  • Rifle Type: AR-15 (If you have a .308 AR variant, check out our AR-10 / .308 page)
  • Material: 6061 Aircraft Aluminum
  • Included Rail Sections: One Aluminum Picatinny Rail Section – 1 3/4” Length, 5 slots
  • Finish: Hard-coat anodized (matte black) or Cerakote – Magpul FDE, Stealth Grey, OD Green, Prison Pink, Titanium, Tungsten, and Burnt Bronze
  • Handguard inside diameter: 1.35”
  • Barrel nut inside diameter: 1.02” (compatible with barrels up to 1” diameter)


  • 9″ Handguard – 9.9 oz
  • 12″ Handguard – 10.9oz
  • 15″ Handguard – 11.9oz

Actual Handguard Length

  • 9″ – 9.25″
  • 12″ – 12.0″
  • 15″ – 15.0″

Frequently Asked Questions:

Will this fit my AR-15?

The SPEAR is specially designed for use with our matching Billet Upper Receiver as well as the majority of mil-spec AR-15’s on the market. In most instances, it will also require the use of a low-profile gas block that fits underneath the rail.

This product will not work with non-mil-spec upper receivers like the Bushmaster Carbon due to the non-standard barrel threads, and it is not compatible with most piston kits as they won’t fit under the handguard.

We’re always glad to verify the fit for your rifle, just contact us! And if it doesn’t fit, we are glad to return it for you. And if you’re new to AR-15, we recommend watching a couple of the videos on our installation video page to understand how the process works.

Want to see the SPEAR in action? Check out 704 Tactical’s Review!

What tools and additional parts are required?

For parts – most setups will require a low profile gas block.

For tools – we recommend:

  • A vise and non-marring vise block for holding the upper
  • A torque wrench to assure you stay in the AR-15 barrel nut torque range while timing the barrel nut (30-60 ft lbs)

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Customer Reviews

Based on 542 reviews
Cody West
Tight and true

The hand guard mounted really nice and was square to the barrel when fired. I really appreciated the instructions and tool that came with it for tightening the barrel nut to the correct torque. I did however have to modify my vice clamp in order to accommodate the tabs that are on the back of hand guard so that I could clamp it down with the hand guard mounted and put the flash suppressor on. This one took a couple of minutes and a round file to make room for the hand guard tabs. Well made, nice tight and square fit.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Joey Graham
Fits like a glove!

I love the look of this 15" FDE handguard, but I REALLY love the weight... or the lack thereof! It mounted perfectly to an Anderson AM-15 upper. I fully seated it against the receiver, bolted it down, and the barrel is pefectly centered. Perfectly level across the top rails. It matches my MOE+ CTR and MFT magazines. There's nothing more I could ask for in a handguard. I think it's perfect!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Darren C. Kimbrell
At3 spear m-lok 12” of green handguard

It fits perfectly machined nicely lite weight color perfectly matches magpul green

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Jesse Davis
Solid built

OD green color was spot on. Was a little worried about the aluminum barrel nut but seems solid. Would definitely recommend.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Easy and solid on MOST uppers

Did require some fitting. The tabs on the back meant to secure around the sides of the receiver would be a nice touch on a standard receiver. I put this on a Fightlite SCR upper that is side charging and shaped differently than milspec. I had to grind those off. It fits securely with just the bolts but that peace of mind of those tabs would have been nice. But It's still very solid and high quality, just keep in mind you may need to fit it to side charging or uniquely shaped uppers. Quality and finish is 5 stars

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.