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AT3 Tactical FFQR Carbine Complete Upper Receiver - 5.56 16" VDI Barrel - Pro Series Free Float Quad Rail

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You will receive fast, free shipping for all orders over $35

Shipping cost is $5.50 for orders under $35. We ship with UPS and USPS. 

Most orders ship out within 24 hours

You will receive tracking information immediately at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses.  

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

If you need to request a return, contact us at 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 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 - we will do our best to make it right.

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Uncompromising quality meets unbeatable value. The AT3 Tactical FFQR Complete Carbine Upper.

Our 5.56 Upper featuring a 16" Carbine Barrel and AT3 Pro Series Free Float Quad Rail.

About Our Uppers

The two most critical parts of a reliable, accurate AR15 are the bolt carrier group (BCG), and the barrel.

That's why the FFQR Series feature a Spike's Tactical BCG and VooDoo Innovations Barrel - two of the most respected names in the industry. The flat-top upper receiver is a Mil-Spec Forged Upper made by BCM.

The free float quad rail, muzzle device, and charging handle are configurable to suit your needs. 

All of our uppers include:

VooDoo Innovations 16" Barrel

This 16" M4-profile 5.56 AR-15 barrel features a 1 in 7" twist, Mil-Spec 4150 Chrome Moly Vanadium Steel, Voodoo Barrels' proprietary QPQ Melonite finish that bonds with the metal on a molecular level and resists carbon adhesion and corrosion.

Spikes M16 BCG (Bolt Carrier Group)

A true Mil-spec BCG - 8620 tool steel M16 bolt carrier w/shrouded firing pin, hard chrome bore, phosphate finish, and laser-engraved Spike's logo.

BCM Forged upper receiver

Machined to true Mil-spec from 7076 T6 forgings, hard coat anodized, laser-etched T-marks

AT3 Tactical micro gas block

Made of 4150 steel - heat and corrosion resistant .750" low profile gas block.

AT3 Tactical Stainless steel carbine-length gas tube

Quality stainless steel gas tube for carbine-length gas systems.

You can customize these parts:

AT3 Tactical Pro Series Free Float Quad Rail (customizeable length - 9", 12.5", 14.5", or 15").

AT3 Tactical 14.5" Extra-Long Free Float Quad Rail Handguard - Pro Series


Slim profile makes them ultra-light and easy to grip. Intricately detailed machining work and superior heat dissipation.


Muzzle device - see options in the dropdown above

Standard A2 Flash Hider


Midwest Industries AR-15 Flash Hider Impact Device Matte Black MI-ARFH1

Midwest Industries Flash Hider/Impact Device


YHM Phantom 556 Flash Hider


Spike's Dynacomp "Shorty" Extreme Muzzle Brake Black -  AR-15 .223/5.56 - SBV1021

Spikes Dynacomp Muzzle Brake


Charging handle - see options in the dropdown above

Standard Charging Handle


BCM Mod 3 Charging Handle


All AT3 Tactical Uppers are custom-built, tested, and shipped within 5 days from our facility in Rogers, Minnesota

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