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    Gear up with AT3 Tactical Pro Series Handguards, with 5 different lengths to suit your next build.


    Free float design enhances accuracy by keeping stress off the barrel.

    Rock-solid 6061 Aircraft Aluminum handguard that withstands the toughest conditions.

    Rail height perfectly matches an AR-15 flat-top upper receiver - your optics, iron sights, and other accessories will line up perfectly.

    Unique low-profile design taller than it is wide (see pictures for exact dimensions). This makes our rail extremely light and easy to grip.

    Backed by the Lifetime AT3 Warranty.

    AR 15 Handguard - AT3 Float Quad Rail in Hand



    Precision milled MIL-STD-1913 (picatinny) rails on all 4 rails. None of the sharp edges that you will find on inferior rails.

    Vent holes that run alongside the gas tube keep the rail cool, even after a long day at the range.

    Hardcoat anodization provides a durable surface that resists scratches and matches your existing parts.  For our those with Magpul Flat Dark Earth Cerakote, the finish is even more durable.

    AR 15 Handguard - AT3 Detailed CNC Machine Work



    The Pro-Series Quad Rails are some of AT3 Tactical's most popular products 5-star reviewed, top-tier AR-15 quad rails at great prices.

    Full kit includes all mounting hardware as pictured below. Installation is simple, just replace your current barrel nut with the nut we provide.

    AR 15 Handguard - AT3 Free Float Quad Rail Parts Grande



    • Universal fits all Mil-Spec AR-15 upper receivers
    • One-piece construction rock-solid fit!
    • Please Note: These quad rails are made for standard AR-15's. If you have a 7.62/.308 AR variant, check out our AR-10 / 7.62 / .308 page.
    • Material: 6061 Aircraft Aluminum
    • Finish: Hard-coat anodized (black) or Magpul Flat Dark Earth Cerakote
    • Length: 7", 9", 12.5", 14.5", 15.75"
    • Inside Diameter: See pictures
    • Weight: 7" - 8.5oz, 9" - 10.1oz, 12.5" - 15.7oz, 14.5" - 16oz, 15.75" - 18oz
    • Packaging: PE Bag
    **PLEASE NOTE THIS RAIL DOES NOT WORK WITH QUAD RAIL END CAPS! (Then again it doesn't need an end cap!)


    Q: How do I know if this will fit my AR-15?
    A: This will fit any AR-15 that has a standard mil spec upper receiver. It will require some modification to your firearm though, including replacing the barrel nut, removing the flash hider, and possibly adding a low profile gas block. Want to learn more? Watch the installation videos.

    Q: Do I need to buy anything else?
    A: For longer handguards you may need to replace the gas block or front sight with a low profile gas block, available here. These gas blocks are low enough to sit under the quad rail. You will also need to get an armorer's wrench for the barrel nut, and we highly recommend a vise block to hold the upper receiver in place while you work on the weapon. Get armorer's tools here.

    Q: Will this work with my AR-10/.308?
    A: No - these quad rails are made for standard AR-15's. If you have a 7.62/.308 AR variant, check out our AR-10 / 7.62 / .308 page.

    Have Questions About this Product?

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    Customer Reviews

    Based on 16 reviews
    You get what you pay for

    First off AT3 is a great company.
    Decent enough hand guard for the price. Pros would be light weight and low cost and looks good. Cons would be it fits loose to where I couldn't get it tight enough and be able to pass the Gass tube through the delta nut without having to had over tighten the nut. So if you plan on mounting iron sights the hand guard shifts slightly causing some inaccuracy, if you're not into that kind of thing then I think I would spend the extra $33 next time and get the flush mount version.

    Hello Kalen, We do appreciate your feedback. We're sorry to hear of your experience thus far, and we would facilitate a return if you so choose. Let us know if we can assist. All the best. - AB
    Awesome rail! Awesome company!

    Very happy with the rail and company. Very fast shipping. I'll be a returning customer.

    Thank you for choosing AT3, Dan! We love having you here and we'll surely be looking forward to doing more business with you in the future! -- LM
    Nice looking rail

    Love the look of the rail. Install was easy. Once I started putting iron sights and a light on the rail itself, I started noticing metal showing through the paint basically from just mounting two aftermarket accessories. For the price it's not a bad deal but I will have to replace this rail sooner than I'd like with exposed metal showing.

    Sorry to hear that the handguard isn't up to our expectations. I will send you an email and we'll get that replaced for you, Michael. Thank you for letting us know! -- LM
    AT3 Quad Rail and BUIS

    Awesome products guys!! Looks great on my rifle!! Better than expected!! I will definitely be a repeat customer. All I need now is the RD50!!

    Daniel, thank you for the great review! We’re so happy you loved the product and can’t wait to have you back. – AB
    AR handguard

    This was a perfect fit for my AR upper build with a 24” heavy barrel, the price was right and the fit and finish were perfect. I’ll probably by more for my future builds.

    That looks great, Richard! We’re so happy you liked the product. We count ourselves lucky for customers like you. Cheers! - AB