Aero Precision M5E1 .308 Fluted Upper Features
The M5E1 upper receiver is forged from 7075-T6 aluminum and precision machined to Aero’s exacting specifications. It features integrated handguard mounting, M4 feedramps, and laser-engraved T-marks. Standard AR .308 components are fully supported, and the upper includes the port door and forward assist pre-installed.
The Gen 2 Enhanced Handguard is built from 6061-T6 aluminum and integrates QD sling sockets at the 3, 6, and 9 o’clock positions, built-in anti-rotation tabs, and scalloped rails for improved grip. Its continuous Picatinny top rail and 1.78″ internal diameter ensure compatibility with 1.5″ suppressors and most muzzle devices.
At its core is an 18″ fluted 416R stainless steel barrel chambered in .308 Winchester, featuring a rifle-length gas system, M4 feed ramp extension, and a .750 gas block journal. The barrel is HP and MPI tested for durability and comes equipped with a standard A2 flash hider.
Aero Precision M5E1 .308 Win 18″ Fluted Specifications
- Manufacturer: Aero Precision
- Model: M5E1 Assembled Upper
- Caliber: .308 Winchester
- Barrel Length: 18″
- Barrel Profile: Fluted
- Barrel Material: 416R Stainless Steel
- Twist Rate: 1:10
- Gas System: Rifle Length
- Gas Block Journal: .750
- Flash Hider: Standard A2 (for .308)
- Receiver Material: 7075-T6 Forged Aluminum
- Feedramps: M4
- Takedown Pin Holes: .2795″
- Forward Assist: Installed
- Port Door: Installed
Gen 2 Enhanced Handguard Features:
- Handguard Material: 6061-T6 Aluminum
- Mounting: 1-Piece Free Float Design
- Anti-Rotation Tabs: Yes
- Sling Sockets: QD at 3, 6, 9 o’clock
- Top Rail: Continuous Picatinny
- Rail Profile: Milled for Grip & Aesthetics
- Inside Diameter: 1.78″
- Compatibility: Low Profile Gas Blocks, Most 1.5″ Suppressors
Frequently Asked Questions About This Product
Why buy Aero Precision M5E1 Assembled Upper .308 Win 18" Fluted from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy Aero Precision M5E1 Assembled Upper .308 Win 18" Fluted?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is Aero Precision M5E1 Assembled Upper .308 Win 18" Fluted available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: RIFLES, Uppers.
What tags or features does this product have?
Key features and tags for this product include: RIFLES, Uppers.
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
FFL Transfer & Firearms Laws for Aero Precision M5E1 Assembled Upper .308 Win 18" Fluted
All firearms, including the Aero Precision M5E1 Assembled Upper .308 Win 18" Fluted, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the Aero Precision M5E1 Assembled Upper .308 Win 18" Fluted is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
