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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.

    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)
    • 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.

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    Customer Reviews

    Based on 5 reviews
    Excellent service

    Excellent service and order tracking

    Great Handguard

    Really nice, fit right up, quality is 100% a tad heavy on the 15.75 inch but for saving $80 plus I can deal with a few extra ounces. Overall 100% feels and looks great, definitely going to buy only these for my builds now.

    Awesome Rails

    I have two sets and they are awesome Rails. They are easy to install and lock up tight. They get the job done. Would highly recommend for any build.

    Still the best quad rails

    These are the only quad rails i plan on using. This is the 2nd i have bought. They feel very quality & sturdy. The best thing other than looks, is how good it feels to hold. No sharp edges & the slim profile are just awesome.

    Great quadrail at a great price.

    This quadrail feels great, is lightweight and a lot cheaper than ordering a full length M-Lok or Keymod Handguard.