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OPEN BOX RETURN AT3™ Free Float Quad Rail Handguards - Pro Series

OPEN BOX RETURN AT3™ Free Float Quad Rail Handguards – Pro Series


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90 Day No-Hassle Returns We Pay Return Shipping

We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at support@at3tactical.com and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at support@at3tactical.com. We may direct you to pursue your warranty claim directly with the manufacturer.

Your satisfaction is our #1 priority

If you’re dissatisfied with your purchase, in any way, please contact us at support@at3tactical.com – we will do our best to make it right.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

Returned items may be scuffed or scratched, packaging may be damaged. Guaranteed functional.

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.

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