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AR Pistol Upper for AR-15 from AT3™

AT3™ 10.5″ AR Pistol Upper for AR-15


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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.

Uncompromising quality meets unbeatable value – The AT3 10.5″ Pistol Upper with SPEAR M-LOK Handguard

AT3 Complete Upper assemblies are Built for Accuracy and Reliability – Guaranteed.

  • Quality Where it Counts – premium components like Ballistic Advantage barrels, and AT3 Tactical’s handguards and uppers. Don’t settle for “bargain uppers” with unknown components.
  • Guaranteed Reliability– Carefully assembled before shipment, and backed by the AT3 Lifetime Warranty
  • Unbeatable Value – Unbeatable quality in the price range. Save vs purchasing the components separately.

This fully assembled AR-15 complete upper includes:

Your Choice of 10.5″ Barrel from Anderson Manufacturing or Faxon Firearms! (with low profile gas block & carbine gas tube)

Choose your barrel! Faxon Firearms or Anderson Manufacturing

Get your new upper complete with the barrel you want! The 10.5″ Anderson Manufacturing barrel is highly affordable, featuring a rugged nitride finish. Faxon Firearms’ 10.5″ barrel is geared towards high performance, featuring great accuracy with a variety of 5.56 bullet weights, and a corrosion-resistant QPQ finish. You can learn more about these two great products with the links below.

Anderson Manufacturing 10.5″ M4 Carbine Length Barrel

Faxon Firearms 10.5″ SOCOM Carbine Length Barrel

AT3 SPEAR 12″ Free Float M-LOK handguard

AT3 Tactical SPEAR M-LOK Free Float Handguard

Unique slim and lightweight design with M-LOK attachment points. Rock-solid 6061 aircraft aluminum handguard that withstands the harshest treatment. 5-slot M-LOK-to-Picatinny rail section included

AT3 Tactical Billet Upper Receiver

AT3 Tactical Billet Upper for AR15

Precision machined from 6061-T6 aluminum, this assembled upper is sleek, with extra material around the barrel extension for superior accuracy. It mates perfectly with our SPEAR handguard and feature M4 feedramps for reliable feeding of ammunition.

KAK Industry Flash Can

One of the most popular muzzle devices for AR15 pistols. The conical shape directs muzzle blast and noise directly in front of the shooter, reducing concussion for the shooter. The standard flash can is only 3.5 inches in length, and fits perfectly under the SPEAR handguard.

Optional Upgrades (use the dropdown menu to select):

AT3 Black Nitride Bolt Carrier Group

(Only $94 – save $6 vs regular price)

AT3 Tactical partnered with the best BCG manufacturer in the industry – Toolcraft Inc – to produce these Top-Tier Bolt Carrier Groups. They feature M16-style carriers, MPI/HPT inspected bolts, and properly staked grade 8 gas key screws.

Your choice of Standard GI or Extended-Latch Charging Handle

(Discounted Pricing – Save $4 vs regular price)

Quality 7075-T6 charging handles – choose between standard latch and extended latch designs.

More info:

This product is built-to-order in our Minnesota facility. Quality takes time – please allow up to 7 days for your order to ship.

All AT3 upper assemblies come with a Lifetime Warranty – if you ever have an issue, let us know, and we’ll make it right. It’s that simple.

Don’t see the options you’re looking for? Let us quote you a custom upper – contact us now.


  • Barrel Length: 10.5″
  • Total Assembly Length: 20″
  • Gas System: Carbine
  • Barrel Profile: Government profile
  • Twist Rate:
    • Anderson: 1:7
    • Faxon: 1:8
  • Barrel Steel: 4150 Chrome Moly Vanadium
  • Barrel Finish:
    • Anderson: Parkerized
    • Faxon: QPQ Corrosion Resistant (Black Nitride)
  • Chamber: 5.56 NATO
  • Muzzle Thread: 1/2-28
  • Barrel Extension: M4
  • Diameter at Gas Block: .750″
  • Gas Block Type: Low-profile
  • Receiver Material: Billet 6061 T6

3 reasons why AT3 Complete Uppers are better than the rest.

1 – Quality Where it Counts

The single most important component of an accurate AR-15 is the barrel. AT3 uppers are built using Ballistic Advantage barrels with a Sub-MOA Accuracy Guarantee.

But the quality doesn’t stop at the barrel. Our AT3 handguard and upper work together to provide superior accuracy, meaning this upper assembly offers quality without compromises.

Many of the “bargain” complete uppers on the market source their parts from the lowest bidder – at the expense of accuracy and reliable function. AT3 is committed to using only top-quality components in our upper assemblies.

2 – Guaranteed Reliability

AT3 complete uppers are assembled with strict quality controls and carefully packaged for delivery to the customer. All AT3 complete uppers offer a Lifetime Warranty – if you ever have an issue, let us know, and we’ll make it right. It’s that simple.

3 – Unbeatable Value

When you buy a complete upper, you’ll save money and parts and assembly vs purchasing the components separately. Our complete uppers are not the cheapest on the market, but they deliver unbeatable quality in the price range. We sell direct to the customer, and cut out the middle-men, to deliver the best value in AR-15 upper assemblies.

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Customer Reviews

Based on 14 reviews
10.5 inch Upper

The product looks good but I have been having light primer strikes using the same lower that I use on my 300 BO upper. Have no light primer strikes with that combination. I am using JP trigger springs in the lower .

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

This upper is very nice and high quality. I would like to say that it is comparable to my Noveske and LMT. High quality but less $$$ compare to the LMT/Noveske. Again thanks for fast shipping as well.

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

Quality finish, perfect fit with Aero lower.

Thanks for sharing your feedback, Jack. We're glad you're satisfied with your purchase. Cheers!
Very satisfied with this upper

Upper arrived in excellent condition. Packaging was great and shipping was fast. The fit and finish of the upper receiver, handguard, and all other components are fantastic. The handguard does not have any rough edges or burs and feels great in the hand. I also purchased the AT3 lower parts kit and used most of the contents on the Fortis lower paired with this upper. Those parts were nice quality as well. This upper meshed nicely with the Fortis billet lower resulting in no play between the two. Despite the poor quality picture I attached, I think they look great together. Have only fired 60 rounds thus far but had no issues and the accuracy of the Faxon barrel did not disappoint. I couldn’t be more pleased with my purchase or the service provided by AT3. I contacted this company by phone as well as e-mail and my inquiries were addressed immediately on both occasions. Top notch service and product quality. Truly a great purchase experience. Also, this is the first time I’ve ever left a review of any purchase or product - the experience with AT3 was so positive that I felt obligated to take the time to express my satisfaction.

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

I love this upper. it looks great, the fit and finish is next to nothing. my only complaint is that a receipt was shipped with the upper, as well as everything else I bought for my build. and with me working offshore and ordering things to have them waiting at home when I get back, my wife gets everything and stores it for me. well she seen all the receipts. every man knows you should never let your wife know what you actually paid for a firearm. that has me in the dog house for quite a few weeks to come.

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