Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
is this Aero Precision M5 complete .308 upper compatible with a Anderson Multi Caliber lower. Also same question for Tacfire DPMS .308 complete upper. Expert Answer

The Aero Precision Complete Upper Receiver M5, .308 Winchester will work with the Tacfire DPMS .308 lower. The Aero Precision Complete Upper Receiver M5 may work for an Anderson Multi Caliber Lower if it is a DPMS Large Frame AR lower receiver.

by Hunter, Gear Expert, August 26, 2022
Can I order this without the flash hider? Manufacturer Answer

This complete upper receiver ships with an A2 style Flash Hider.

by Aero Precision USA, Manufacturer, May 20, 2020
Customer Reviews
Most Recent Reviews
Review: Aero Precision M5 18in .308 Upper Receiver by Erik, Verified Owner, December 17, 2024
I couldn’t be more impressed with the Aero Precision M5 18in .308 Upper Receiver. Right out of the box, the fit and finish are flawless, and it pairs up perfectly with my Aero M5 lower receiver. The precision machining and attention to detail make it...
Read More...
Most Recent Reviews
Really nice upper by Bic, Verified Owner, September 14, 2024
For the money…I don’t think you can built the build and finish of Aero products. While I have only fired few rounds, it fits really well in my hands I love their S-One handguard. I have it on two other rifles
Most Recent Reviews
Fit and finish are great and it fit with AERO lower perfectly. There were no issues but i have not had time to take to the range to see how accurate it performs. It was shipped quickly and arrived with no problems. I had to order twice since the or...
Read More...
Most Recent Reviews
M5 18” 308 complete upper by Joe r, December 10, 2023
This thing is very attractive . Excited to use. Waiting on scope to come. Looks like good quality. Came fast in the mail.
Most Recent Reviews
This upper is one of the best on the market. Very pleased with how this ar10 turned out. The fit and finish were out of this world. I was trying to build a substantial AR10 but keep it on the lighter side. This upper was exactly what i was looking fo...
Read More...
Read All 5 Reviews
Caliber: .308 Winchester Barrel Length: 18 inGas System Length: Rifle Length Barrel Twist Rate: 1-10 Threads per Inch: 5/8x24 Muzzle Device: A2 Flash Hider Finish: Cerakote Color: FDE Gun Model: M5 Condition: New Included Accessories: None Weight: 68.5 oz

Code: 29D-UFH-AEUPATL-APAR538115M69

MPN: APAR538115M69

UPC: 815421028591

List: $820.00Save 10%
$739.99

ATTENTION! We currently do not ship this product to AK, CA, HI, IL, NY, WA, P.O. Boxes, and U.S. Territories.

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider

This Aero Precision Complete Upper Receiver M5, .308 Winchester is a reliable foundation for your new build with an included M5 hand guard and barrel. Forged from 7075 T6 aluminum, this Upper Receiver is tough enough to hold up in the field and is lightweight enough to not weigh your build down. The aerospace-grade ATLAS S-ONE handguard that comes with the Aero Precision Complete M5 Upper Receiver M5, .308 Winchester is a rugged and lightweight mounting platform while still providing the trusted strength and stability you need. This upper receiver assembly is compatible with standard AR15 upper receivers and barrels and has front and rear Picatinny rails to host your favorite optics, lasers and other attachments. Customize your rifle with this complete assembly including an M4 feedramp, DPMS High Profile (.210) Tang and a .750 gas block journal to accommodate different length gas systems. Then, after a rigorous MPI and HP testing, the barrel is MPI and HP tested to ensure it's chambered in .308 Winchester. Install this complete .308 Winchester 18in barrel onto your rifle to complete the build of your new upper build.image

WARNING: California`s Proposition 65

Specifications for Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Caliber: .308 Winchester
Barrel Length: 18 in
Gas System Length: Rifle Length
Barrel Twist Rate: 1-10
Threads per Inch: 5/8x24
Muzzle Device: A2 Flash Hider
Finish: Cerakote
Color: FDE
Gun Model: M5
Condition: New
Fabric/Material: 7075-T6 forged aluminum
Attachment Type: Picatinny
Gun Rail: M-LOK
Gun Type: Rifle
Gun Make: Aero Precision
Included Accessories: None
Barrel Material: 416R Stainless Steel
Weight: 68.5 oz
Magazine Included: No
Mount Type: Picatinny
Country of Origin: USA

Features of Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider

  • M5 Assembled Upper Receiver Features:
  • Forged from 7075 T6 aluminum
  • M4 Feedramps
  • .2795 takedown pin holes
  • Laser engraved T-marks
  • DPMS High Profile (.210) Tang)
  • Includes port door and forward assist
  • ATLAS S-ONE Handguard Features:
  • Front and rear picatinny rail
  • Eliminated center of top rail for weight reduction
  • Indexing grooves in 12:00 position for positive grip control
  • Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
  • Compatible with low profile gas blocks
  • 1.3 Inside diameter
  • 1.5 Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels
  • Learn More about our NEW ATLAS S-ONE Hanguards
  • 18" .308 Fluted Stainless Steel Barrel, Rifle Length Features:
  • .308 Winchester 18" Barrel, 1/10 twist, 416R Stainless Steel, gas port drilled
  • .750 gas block journal
  • Rifle length gas system
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard .308 A2 flash hider

Package Contents:

  • Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider
  • Includes:
  • M5 (.308) Threaded Assembled Upper Receiver
  • 15" M-LOK ATLAS S-ONE Handguard
  • 18" .308 Fluted Stainless Steel Barrel Rifle Length
  • Low Profile Gas Block and Rifle Length Gas Tube
  • .308 A2 Birdcage Flash Hider

Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision Complete Upper Receiver M5, .308 Winchester, 18in Fluted SS Barrel, Rifle Length w/ ATLAS S-ONE 15in M-LOK Handguard, FDE, APAR538115M69 , MPN: APAR538115M69 , UPC: 815421028591 , Code: 29D-UFH-AEUPATL-APAR538115M69

Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Aero Precision Complete Upper Receiver M5, .308 Winchester, 18in Fluted SS Barrel, Rifle Length w/ ATLAS S-ONE 15in M-LOK Handguard, FDE, APAR538115M69 , MPN: APAR538115M69-DEMO , Code: 29D-UFH-AEUPATL-APAR538115M69-DEMO
  • Aero Precision Complete Upper Receiver M5, .308 Winchester, 18in Fluted SS Barrel, Rifle Length w/ ATLAS S-ONE 15in M-LOK Handguard, Anodized, Black, APAR538105M69 , MPN: APAR538105M69 , UPC: 815421028607 , Code: 29D-UFH-AEUPATL-APAR538105M69
Compare (0)