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Aero Precision M4E1-T 20in .350 Legend Complete Upper with Flash Hider Up to 27% Off Plus Blazin' Deal w/ Free Shipping — 2 models

Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100
1 of 4 images
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100
2 of 4 images
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100
3 of 4 images
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100
4 of 4 images
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100

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Questions & Answers
What is the optimal barrel lenght and twist rate for the 350 legend? Expert Answer

Optimal barrel length for a 350 Legend barrel is between 16" - 24" in length with a 1/16 twist. A 24-inch barrel averages 100 fps faster and 10 percent more bullet energy than a 16-inch barrel. A barrel shorter than 16-inches will begin to reduce the effective range below the established 250-yards.

by Ethan, Gear Expert, May 16, 2023
For the 350 legend, does that require a caliber specific BCG or will a .223 work? Expert Answer

350 Legend uses the same case head dimensions as 5.56, so you can use any standard 5.56/.223 BCG in your AR build.

by Ethan, Gear Expert, November 28, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Most Recent Reviews 350 Legend by AL, Verified Owner, April 25, 2025
Love Aero precision, first 350= Legend and it Shoots awesome!!
Read 1 Review

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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 M4E1-T 20in .350 Legend Complete Upper with Flash Hider

350 Legend offers great performance for hunting medium game with the AR15 platform. Being a straight walled cartridge, 350 legend allows for legal hunting in some states or jurisdictions with regulations that prohibit the use of bottleneck cartridges that are commonly used for hunting in the AR15/AR10 platforms.image

NOTE: Ensure you comply with all rules and regulations for your specific hunting area.

This complete upper includes our ATLAS R-ONE Handguard. The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

WARNING: California`s Proposition 65

Specifications for Aero Precision M4E1-T 20in .350 Legend Complete Upper with Flash Hider:

Manufacturer: Aero Precision
Caliber: .350 Legend
Overall Length: 30 in
Barrel Length: 20 in
Barrel Profile: DMR
Gas System Length: Carbine Length
Barrel Twist Rate: 1-16
Threads per Inch: 1/2x28
Handguard Type: Free-Float
Muzzle Device: A2 Flash Hider
Gun Model: M4, AR-15
Condition: New
Fabric/Material: 7075-T6 Aluminum
Gas Block Journal Size-Diameter: .075 in
Handguard Length: 15 in
Handguard Style: Hybrid Rail
Gun Rail: Picatinny
Gun Type: Rifle
Gun Make: Aero Precision
Included Accessories: None
Barrel Material: 416R Stainless Steel
Bolt Carrier Group Included: No
Charging Handle Included: No
Weight: 70 oz, 4 lb
Magazine Included: No
Mount Type: M-LOK
Country of Origin: USA

Aero Precision M4E1-T 20in .350 Legend Complete Upper with Flash Hider

M4E1 Threaded Upper Receiver Features:

  • New enhanced forging that gives the upper receiver a "billet look"
  • New picatinny profile that blends seamlessly with our Enhanced Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes port door and forward assist installed

ATLAS R-ONE Handguard Features:

  • Full top picatinny rail
  • 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

20" .350 Legend DMR CMV Carbine Length Barrel Features:

  • .350 Legend 20" Carbine Length, 1/16 twist, 4150 CrMoV, QPQ, gas port drilled
  • .750 gas block journal
  • DMR Profile
  • Carbine length gas system, .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard 9mm A2 flash hider

Package Contents:

  • Aero Precision M4E1-T 20in .350 Legend Complete Upper with Flash Hider
  • M4E1 Threaded Assembled Upper Receiver
  • 16.6" ATLAS R-ONE Handguard of choice
  • 20" .350 Legend DMR CMV Carbine Length Barrel
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled

This product is compatible with the following gun models: AR-15, M4

Aero Precision M4E1-T 20in .350 Legend Complete Upper with Flash Hider Orderable Models

List of Orderable Models

Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Cerakote, FDE Cerakote, APAR700716M100 , MPN: APAR700716M100 , UPC: 840014617715 , Code: 29D-UFH-20IMCP-APAR700716M100
Aero Precision Complete Upper, M4E1-T, .350 Legend, 20in, RM16.6 Anodized, Black, APAR700106M100 , MPN: APAR700106M100 , UPC: 840014617692 , Code: 29D-UFH-20IMCP-APAR700106M100
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