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Questions & Answers
Does this include the BCG? Manufacturer Answer

The BCG and charging handle are not included and will need to be purchased separately.

by Aero Precision USA, Manufacturer, February 25, 2022
Is it dims gen 1 or gen 2 Expert Answer

The Aero Precision M5 20in .308 SS Complete Upper Receiver is Gen 1 DPMS pattern and designed to be used with the Aero Precision M5 lower receiver.

by Ethan, Gear Expert, August 15, 2022
Customer Reviews
Helpful Positive Review
Aero uppers dont come pre-assembled and thats how you can clearly see the other two reviews were bs for some reason
4/8 found this helpful
Helpful Negative Review
I purchased this upper and fired it for the first time recently. After 8 rounds, I experienced significant deviation in accuracy, followed by two failure to extract events. After a total of 12 rounds, I ceased firing. Back at the shop, here is what...
Read More...
31/32 found this helpful
Most Recent Reviews
308 AR10 upper by Smitty, Verified Owner, June 26, 2025
Need to get to the range and see how it groups with ball and match ammo.
Most Recent Reviews
Horrible accuracy by Pengyu, November 22, 2023
This stupid upper gave me a 6 MOA group at 100 yard, as same as my Mossberg 590.
6/7 found this helpful
Read All 4 Reviews

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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 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard

Building on an AR platform is a serious undertaking, but building on an upper receiver that's already assembled takes a lot of stress off of your gear. These AR15 Handguards & Forends from Aero Precision simplify the build process by including everything you need to install the receiver and headrest assembly but still leave enough room for a good portion of your rail. You can install this kind of versatility onto an AR platform by adding this Aero Precision M5 20in .308 SS Complete Upper Receiver w/ ATLAS S-ONE Handguard onto your current upper receiver. This combination is great for those who want to build a more compact upper for their current setup or for those who already have a handguard they don't absolutely love. Customize your gun with this versatile Aero Precision M5 Complete Upper .308 Stainless Steel Receiver w/ ATLAS Handguard that will dominate competitions and range visits alike.image

Specifications for Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard:

Manufacturer: Aero Precision
Caliber: .308 Winchester
Overall Length: 30 in
Barrel Length: 20 in
Gas System Length: Rifle Length
Barrel Twist Rate: 1-10
Threads per Inch: 5/8x24
Handguard Type: Free-Float
Muzzle Device: A2 Flash Hider
Gun Model: M5
Condition: New
Fabric/Material: 416R Stainless Steel
Gas Block Journal Size-Diameter: .750 in
Handguard Length: 15 in
Gun Rail: Picatinny
Gun Make: Aero Precision
Included Accessories: None
Barrel Material: 416R Stainless Steel
Weight: 70 oz
Magazine Included: No
Mount Type: M-LOK
Projectile Caliber: .308 Caliber
Country of Origin: USA

Features of Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard

  • M5 Assembled Upper 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
  • 1.5in Inside diameter
  • 1.75in Outside diameter
  • Compatible with AR-308 Upper Recievers with a thread pitch of 1-7/16 x 16 along with a DPMS High Profile (.210) Tang Rail
  • Learn More about our NEW ATLAS S-ONE Hanguards
  • 20in .308 Stainless Steel Barrel Features:
  • Twist: 1 in 10
  • Threading: 5/8 x 24
  • Material: 416R Stainless Steel
  • Finish: Bead Blasted
  • Gas Block Journal: .750
  • Gas System Length: Rifle Length
  • Weight: 54.24 oz
  • DPMS Barrel Extension
  • HP and MPI Tested

Package Contents:

  • Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard

Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard Orderable Models

List of Orderable Models

  • Aero Precision M5 Complete Upper Receiver, 20in .308 SS Rifle Barrel, w/ATLAS S-ONE 15in M-LOK Handguard, Anodized, Black, APAR538105M34 , MPN: APAR538105M34 , UPC: 840014609338 , Code: 29D-UFH-YM93K-APAR538105M34
  • Aero Precision M5 Complete Upper Receiver, 20in .308 SS Rifle Barrel, w/ATLAS S-ONE 15in M-LOK Handguard, Anodized, Flat Dark Earth, APAR538115M34 , MPN: APAR538115M34 , Code: 29D-UFH-YM93K-APAR538115M34

Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard Unavailable & Discontinued Models

List of Unorderable Models

  • Aero Precision M5 Complete Upper Receiver, 20in .308 SS Rifle Barrel, w/ATLAS S-ONE 15in KeyMod Handguard, Anodized, Black, APAR538005P34 , MPN: APAR538005P34 , Code: 29D-UFH-YM93K-APAR538005P34
  • Aero Precision M5 Complete Upper Receiver, 20in .308 SS Rifle Barrel, w/ATLAS S-ONE 15in KeyMod Handguard, Anodized, Flat Dark Earth, APAR538015P34 , MPN: APAR538015P34 , Code: 29D-UFH-YM93K-APAR538015P34
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