Aero Precision M5 16″ Complete AR10 MLOK Free-Float Upper – .308 WIN

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Aero Precision M5 16″ Complete AR10 MLOK Free-Float Upper – .308 WIN

The Aero Precision M5 Complete Upper is an excellent option for those looking to build a lightweight .308 battle rifle. This upper comes with a 16″ barrel that has a 1:10 twist rate and a mid-length gas system. The ATLAS S-ONE handguard is included and has a slim profile that is both durable and dependable. The handguard features the proprietary ATLAS attachment system, which provides a strong and stable mounting platform.

Perfect for a designated marksman or patrol rifle, this M5 Complete Upper includes an M5 Assembled Upper Receiver, an ATLAS S-ONE Handguard, and a 16″ .308 SS Barrel with a mid-length gas system.

ATLAS S Handguard

The ATLAS S Handguard is designed to be lightweight and slim, making it the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable mounting platform that maintains a slim profile while still providing the strength and stability that customers have grown to love from Aero Precision handguards. The anodized finish gives it a sleek and professional look that will complement any build.

The handguard also features M-LOK slots, which allow for the attachment of accessories and other add-ons.


In addition to its high-quality construction and reliable shooting experience, this upper receiver is also incredibly easy to install. The product comes pre-assembled, so you can easily install it onto your lower receiver using the take-down pins.

Please note that this complete upper does not include a BCG or Charging Handle. You will need to purchase these items separately or use ones that you already have. With that said, the Aero Precision M5 Complete Upper is an excellent option for anyone looking to build a reliable and accurate .308 rifle. Whether you are a seasoned shooter or a beginner, this upper will meet and exceed your expectations.

Aero Precision’s Excellence Guarantee

Aero Precision is a company that prides itself on its engineering and machining expertise. With roots in the aerospace industry, they bring a level of precision and attention to detail that is unmatched in the firearms industry. Every component that they produce is held to the highest standards of quality and performance.


  • M5 Assembled Upper Receiver
  • ATLAS S Handguard
  • 16″ .308 Stainless Steel Barrel
  • Low Profile Gas Block and Mid-Length Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle


  • Brand: Aero Precision
  • Model: M5 16″ Complete AR10 MLOK Free-Float Upper
  • Caliber: .308WIN/7.62NATO
  • Barrel Length: 16 in
  • Thread Pitch: 5/8×24
  • Twist: 1:10
  • Color: Black and Flat Dark Earth
  • Material: 7075-T6 Aluminum and 4150 Chrome Moly Vanadium
  • Finish: QPQ corrosion-resistant finish
  • Gas System: Mid-Length
  • Weight: 3.76 lbs

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Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Aero Precision Warranty

If for any reason you have a warranty issue with one of our products, please contact us at 253-272-8188.

Please describe your situation, include your name and order number or transaction id. One of our technical specialists will then review your claim and contact you within 3-5 business days.

If you have images to send, please email them to

Damaged Items

In regards to claims dealing with damaged or blemished products, we ask that you create a Help Desk Ticket on your My Account page. If you don’t have an account with us, please go to the Contact Us page and fill out the form for review within 72 hours upon receiving the shipment.

If you have images to send, please email them to

Failed Background Check

There will be a 30% restocking fee on all lower receivers returned because of failed background checks.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.