0 Cart
Added to Cart
    You have items in your cart
    You have 1 item in your cart
    View Cart / Checkout Continue Shopping

    Our signature rifle-length free float quad rail - the AT3 Tactical Pro Series 12.5" Free Float Quad Rail.


    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.



    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.




    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.


    • 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: 12.5"
    • Inside Diameter: See pictures
    • Weight: 15.7oz
    • 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?

    Ask Us Now

    Customer Reviews

    Based on 42 reviews
    Cory A. C.A. Cory A.
    Excellent Product

    Rock solid rail - Very comfortable when shooting - looks great - easy install - fast ship - will buy from AT3 again - Thanks

    Don Baker D.B. Don B.
    Awesome Product

    Fits perfect, easy install, looks great on my carbine length AR-15 build. Will probably order again for future builds

    Steve J. S.J. Steve J.
    12.5" Quad Rail

    Have to say I'm surprised. I expected less but this rail is a quality product. it's sturdy and the low profile helps immensely with handling.

    Brian Gelpi B.G. Brian G.
    Great product!

    A little heavier than what I thought but if you can't handle it go to the gym. It's strong, sturdy and well worth the money. Fit great looks great. I love it. Fast shipping and great customer service!!

    Bryan B. Bryan
    Solid rail, great price, fast free shipping

    this was my first free float build. Prices are better than any other rails I could find and it works exactly as advertised. Rock solid rail. looks good on a 16" barrel.