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The AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards will fit any Mil-spec AR15 upper receiver. As long as you do not have a piston system or fixed front sight the handguard should fit as intended.

by Ethan, Gear Expert, September 29, 2022
The 14.5 handguard reads as 15 inches in the cart instead of 14.5 so which is it? Expert Answer

Please email us at techsales@opticsplanet.com regarding your question.

by Hunter, Gear Expert, November 15, 2023
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Product Info for AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards

The New and Improved Pro Quad Rail Lightweight, Rigid, and Easier to Installimage

The quad rail is still the gold standard of secure accessory mounting, but they're in desperate need of a reboot. That's what we offer with the AT3 Pro Quad Rail. It uses the same simple installation as our SPEAR M-LOK handguard, has plenty of lightening for maximum comfort, and it works with Mil-spec uppers, as well as our Billet Upper to match the sleek contours.

The Pro Series Rail comes in 7, 9, 12.5, and 15 inch lengths, making it ideal for upgrading existing guns or starting fresh with specialized AR15 builds. If you're planning a build without a Front Sight Base, make sure you pick up a Low Profile Gas Block with the handguard.

Simple Installation:

Installs easily, just like our SPEAR M-LOK rail you'll only need a few simple tools to get the rail installed. Click here to view our instructions.

Perfect for assembling a new build or upgrading an existing rifle its compatible with most mil-spec upper receivers on the market

Once you've got it installed, you'll have plenty of room for any Picatinny rail accessories like lights, foregrips, lasers, or bipods

Seriously, its easy. Check out our video below for a guide on the complete installation.

Specifications for AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards:

Manufacturer: AT3 Tactical
Finish: Hard Coat Anodized
Fabric/Material: 6061 Aircraft Aluminum
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Handguard Type: Free-Float
Handguard Style: Quad Rail
Gun Rail: Picatinny
Condition: New
Included Accessories: Standard
Inner Diameter: 1.02 in
Outer Diameter: 1.35 in
Quantity: 1

Features of AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards

  • This rail is lightened down all four sides of Picatinny Rail, making it lightweight while still remaining solid for all your favorite accessories
  • 5 Integrated non-rotating QD Sockets for a variety of sling configurations
  • Durable 6061 aircraft aluminum alloy construction designed to take a beating
  • Picatinny top rail perfectly aligns with AR-15 flat-top upper receivers, both forged and our AT3 Billet Upper
  • Handguard uses screws to clamp around the barrel nut, with anti-rotation tabs and anti-slip screws that ensure a rock-solid lockup

Package Contents:

  • AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards
  • AT3 Pro Handguard
  • 7075 T6 Aluminum Barrel Nut
  • Mounting Hardware with Allen Wrenches
  • Barrel Nut Wrench

AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards Orderable Models

List of Orderable Models

AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 7in Carbine Length, Black, AT3-QR-7 , MPN: AT3-QR-7 , UPC: 5060748420060 , Code: 4U2-HZ-ATT1242-AT3-QR-7
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 9in Mid-Length, Black, AT3-QR-9 , MPN: AT3-QR-9 , UPC: 5060748421876 , Code: 4U2-HZ-ATT1242-AT3-QR-9
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 12.5in Rifle Length, Black, AT3-QR-12 , MPN: AT3-QR-12 , UPC: 783935100761 , Code: 4U2-HZ-ATT1242-AT3-QR-12
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 15in Extended Rifle Length, Black, AT3-QR-15 , MPN: AT3-QR-15 , UPC: 783935100785 , Code: 4U2-HZ-ATT1242-AT3-QR-15
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 7in Carbine Length, FDE, AT3-QR-7-FDE , MPN: AT3-QR-7-FDE , UPC: 5060748420077 , Code: 4U2-HZ-ATT1242-AT3-QR-7-FDE
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 9in Mid-Length, ODG, AT3-QR-9-ODG , MPN: AT3-QR-9-ODG , UPC: 783935100754 , Code: 4U2-HZ-ATT1242-AT3-QR-9-ODG
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 15in Extended Rifle Length, ODG, AT3-QR-15-ODG , MPN: AT3-QR-15-ODG , UPC: 783935100808 , Code: 4U2-HZ-ATT1242-AT3-QR-15-ODG
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 15in Extended Rifle Length, FDE, AT3-QR-15-FDE , MPN: AT3-QR-15-FDE , UPC: 783935100792 , Code: 4U2-HZ-ATT1242-AT3-QR-15-FDE
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 7in Carbine Length, ODG, AT3-QR-7-ODG , MPN: AT3-QR-7-ODG , UPC: 783935100730 , Code: 4U2-HZ-ATT1242-AT3-QR-7-ODG
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 9in Mid-Length, FDE, AT3-QR-9-FDE , MPN: AT3-QR-9-FDE , UPC: 783935100747 , Code: 4U2-HZ-ATT1242-AT3-QR-9-FDE
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 12.5in Rifle Length, ODG, AT3-QR-12-ODG , MPN: AT3-QR-12-ODG , UPC: 783935100778 , Code: 4U2-HZ-ATT1242-AT3-QR-12-ODG
AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 12.5in Rifle Length, FDE, AT3-QR-12-FDE , MPN: AT3-QR-12-FDE , UPC: 5060748420091 , Code: 4U2-HZ-ATT1242-AT3-QR-12-FDE

AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards Unavailable & Discontinued Models

List of Unorderable Models

USED, AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 7in Carbine Length, Black, AT3-QR-7 , MPN: AT3-QR-7-EDEMO , Code: 4U2-HZ-ATT1242-AT3-QR-7-EDEMO-IN-U
USED, AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 9in Mid-Length, Black, AT3-QR-9 , MPN: AT3-QR-9-EDEMO , Code: 4U2-HZ-ATT1242-AT3-QR-9-EDEMO-SC-C
USED AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 9in Mid-Length, ODG, AT3-QR-9-ODG, EDEMO1, Condition Fair, Scratches , MPN: AT3-QR-9-ODG-EDEMO1 , Code: 4U2-HZ-ATT1242-AT3-QR-9-ODG-EDEMO-SC-D
USED AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 15in Extended Rifle Length, Black, AT3-QR-15, EDEMO2, Used, Condition Fair , MPN: AT3-QR-15-EDEMO2 , Code: 4U2-HZ-ATT1242-AT3-QR-15-EDEMO2
USED AT3 Tactical Pro Series Free Float Quad Rail AR15 Handguards, 9in Mid-Length, FDE, AT3-QR-9-FDE, EDEMO1, Used, Condition Fair , MPN: AT3-QR-9-FDE-EDEMO1 , Code: 4U2-HZ-ATT1242-AT3-QR-9-FDE-EDEMO1
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