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    The AT3 Tactical 14.5" Free Float Quad Rail provides an unfailing grip and plenty of room for accessories.


    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 Free Float Quad Rail on 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.

    Also available in Magpul™ Flat Dark Earth Cerakote - for an ideal match with Magpul FDE accessories. 


    AR-15 Handguard - AT3 Quad Rail Detailed CNC Machine Work



    The Pro-Series Quad Rails are 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


    • Made in Minnesota, USA
    • Please Note: These quad rails are made for standard AR-15's. If you have a 7.62/.308 AR variant, check our our AR-10 / 7.62 / .308 page.
    • Material: 6061 Aircraft Aluminum
    • Finish: Hard-coat anodized (black)
    • Length: 14.5"
    • Inside Diameter: See pictures
    • Weight: 16oz
    • 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 our our AR-10 / 7.62 / .308 page.

    Have Questions About this Product?

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    Customer Reviews

    Based on 46 reviews
    Solid rail

    Very satisfied with the quality of the rail and it’s very solid. Customer service is 2 thumbs up!

    Recived my new hand guard

    Products looks, feels great and the weight is perfect. As soon as it is installed I will upload a couple of pictures.

    Thank you Ruben! We appreciate the feedback, and we're glad you're liking it so far.
    Free Float HandGuard

    The product never arrived due to missing address information on my part. I called and spoke to Luke in the customer service department and explained the situation. Luke verified the address and re-sent the item. I have not yet received it but that is probably due to the Christmas Holiday. Luke was very nice, knowledgeable and helpful. I am looking forward to receiving the product.

    We're glad to help, Ruben! Thank you for the feedback
    AT3 is the best!

    Ordered this quad rail and I️t shipped to the wrong address. They called me up and let me know where it was delivered. Amazing customer service.

    This rail is amazing and looks great on my AR. Lots of options with I️t and couldn’t be happier with how it looks and feels.

    Lookin' good, McLean! Thank you for the feedback and for your business with us!
    Very satisfied

    Great quality product and very light! The FDE matches Magpul FDE spot on. Highly recommend it. Very fast delivery, accurate tracking number, all said and done I'm very pleased.

    We are glad to hear that you are pleased with the quality and coloring of the handguard