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AT3™ Free Float Quad Rail Handguards - Pro Series - 5 Sizes and 2 Colors

AT3™ Free Float Quad Rail Handguards – Pro Series – 5 Sizes and 3 Colors


MSRP: $55.99


Out Of Stock

Lifetime WarrantyOn All AT3 Brand Products

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

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.

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), Magpul Flat Dark Earth Cerakote, or Magpul Stealth Grey 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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Customer Reviews

Based on 47 reviews
12 inch quad

AT3 brings the quad back to life with its sleek and thin profile.... key mod and m lok are nice but if old school lovers of the rough and ready cheese grater pic rails are your taste then these are paramount to any build....I have a 12 one mine and all my “breacher” style builds for people always get th 7 inch....the dual lock pins and oversized flange nut hold solid with no loctite 1000 rounds in..... 63 bucks to my porch....? With every fu#kin penny!!!

Thanks for sharing your feedback. We're so glad you're satisfied with your purchase. Cheers!
Great product

Very light great product very happy

Thanks for sharing your experience, Chad. We're glad you're satisfied with your purchase. Cheers!

It was perfect I love the way it looks and the availablity to put what ever I want on all around it’s bad ass

Thanks for sharing your experience, Colton. We're glad you're satisfied with your purchase. Cheers!

The ordering and shipping process went really well!!

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Makes a Great Looking "Business Office!"

I don't know where one goes to beat this rail for quality versus investment. No swoopy angles or latest fad's. Just a solid tool to help one get to the top of the hill! Mounting and timing was easy (great instructions) and with the gas tube reinstalled, bringing solidity to the mount and the rail was simple, and quick. It really mounts solid. This was a new build, from scratch; however even removing an old system and replacing it with this one is only about a 45 minute job.

Thanks for sharing your feedback. We're glad you're satisfied with your purchase. Cheers!