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    The New AT3™ SPEAR M-LOK™ AR-15 Free Float Handguard - 12 & 15 inch LengthsThe 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 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.
    • Seriously, it's easy.  Torque down the barrel nut, slip the handguard over, and tighten down the screws.  No need for special plates or adhesives for a rock-solid fit
    • 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

    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)
    • Handguard inside diameter: 1 3/8”
    • Barrel nut inside diameter: 1.02” (compatible with barrels up to 1” diameter)
    • Weight
      • 12" Handguard – 9.3 oz (handguard only) / 10.9oz (handguard + hardware)
      • 15" Handguard – 10.3oz (handguard only) / 11.9oz (handguard + hardware)

    Frequently Asked Questions:

    Will this fit my AR-15?

    AT3 SPEAR M-LOK AR 15 Free Float Handguard Forged Upper Rotation      AT3 SPEAR M-LOK AR 15 Free Float Handguard Billet Upper Anti-Rotation

    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 milspec 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?

    Ask Us Now

    Customer Reviews

    Based on 12 reviews
    Just bought #2 and love it!!!!

    I just bought my second 15” hand guard and love it as much as I did the first one!!!! Fits great, feels great, looks great and is very light weight!
    Was easy to mount and all tolerances were right on.
    Definitely recommend this for anyone wanting to lighten a heavy rifle and also wants great looks and a strong hand guard!
    Thanks AT3 for quick shipping and great customer service !!!!

    Glad to hear you're satisfied with your order, Joe. Thank you for the feedback! -- LM
    Lightweight, Looks, & Feels Great!

    I’m new to the M-Lok world. Received my product and the first thing I noticed was the packaging is up to par and how incredibly light it was. When you’re adding additions to your rifle that is important. It’s also smooth with no burs. It does have great venting so I’m sure that will help on range day. They give you a bonus m-lock small rail to start your build with. I’d say good length for pistol grips or flashlights. Overall for the price this is a contender and if you’re on the fence just go ahead and send it. You won’t be upset. Make sure to purchase a low-pro gas block and tube so it will fit if going from stock handguard to this. .750 gas block is the size you’re looking for. Enjoy

    Thanks for sharing the pictures, Brandon. Looks fantastic! We appreciate you sharing your experience with us. We work hard to meet expectations like yours and we're happy we hit the mark for you. - AB
    Very Satisfied

    I purchased the AT3™ SPEAR M-LOK™ AR-15 Free Float Handguard in 15 inches for my 16 inch Del-Ton Ar-15 with a 16-inch barrel. The fitting for the handguard was perfect and worked well with the low-profile gas block in .750 (for other buyers out there). The instructions were clear and provided tools helped in the installment process. The only extra tool that I needed was the Ar-15 armorers tool, which I already had - used for taking the existing barrel and barrel nut off. Included both a before and after picture. For this new handguard, I removed the orginal Ar-15 front sight and added a Magpul back-up front sight post.

    Wow, wow! That's a significant change and looking really great! We appreciate the detailed feedback, J. -- LM
    AT3™ SPEAR M-LOK™ AR-15 Free Float Handguard

    Beautiful, strong, lightweight, great finish.

    Thanks for taking the timeout to post a review, Wilfred. We work hard to meet expectations like yours, we're happy we hit the mark for you - AB
    Good Buy

    I have ordered several free float hand guards and this one is definitely the best. It is well made, light, and very ergonomic. The barrel nut is at the top of the line. It is sturdy, and does not require adjusting to align the installation of the gas tube. Nut wrench is also included and is heavy-duty. The six included screws provide for a very stable installation. I will buy again when I need a hand guard on my next build.

    Thanks for sharing your experience, Ken. We're glad you're satisfied with your purchase. Rest assured that we'll continue providing great service - AB