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Questions & Answers
What barrel manufacturer is the barrel from? Expert Answer

The Aero Precision M4E1-T 16in .350 Legend Complete Upper uses a Ballistic Advantage .350 Legend DMR CMV Carbine Length Barrel.

by Ethan, Gear Expert, August 31, 2023
What is the TPI for the barrel used in the complete upper? Expert Answer

The Aero Precision M4E1-T 16in .350 Legend Complete Upper with Flash Hider muzzle threads are 1/2x28.

by Hunter, Gear Expert, August 28, 2023
Customer Reviews
Helpful Positive Review
Aero Precision Upper by Drew Wolfe, Verified Owner, October 25, 2023
Super nice upper. First 350 legend I’ve done. Bought the matching BCG for it to and am very happy with it!
2/2 found this helpful
Most Recent Reviews
Shoots good by Aj, Verified Owner, October 19, 2025
Aero makes a good product. There seems to be quite a few people having feeding issues with a lot of the 350 legend uppers on the market(looking at you bca) I put this on an anderson lower that had not seen much use. So far have not had any failure to...
Read More...
Most Recent Reviews
yes yes yes by tex8675309, Verified Owner, December 27, 2023
Running it with my ruger lower, agm rattler and wolfman suppresser. Great upper. Useing my bolt carrier assembly from my 223.
Most Recent Reviews
Nice upper for the price by TL, November 29, 2023
Had a couple fail to feeds at first but once it got some rounds down the barrel no more issues.
Read All 4 Reviews
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ATTENTION! We currently do not ship this product to AK, CA, HI, IL, NY, WA, P.O. Boxes, and U.S. Territories. Please see our policies for more information.

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 16in .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 16in .350 Legend Complete Upper with Flash Hider:

Manufacturer: Aero Precision
Caliber: .350 Legend
Overall Length: 26 in
Barrel Length: 16 in
Barrel Profile: M4
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: 48.5 oz, 4 lb
Magazine Included: No
Mount Type: M-LOK
Country of Origin: USA

Features of Aero Precision M4E1-T 16in .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

16" .350 Legend DMR CMV Carbine Length Barrel Features:

  • .350 Legend 16" 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 16in .350 Legend Complete Upper with Flash Hider
  • M4E1 Threaded Assembled Upper Receiver
  • 15" ATLAS R-ONE Handguard of choice
  • 16" .350 Legend DMR CMV Carbine Length Barrel
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled

Aero Precision M4E1-T 16in .350 Legend Complete Upper with Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision Complete Upper, M4E1-T, .350 Legend, 16in, RM16.6 Cerakote, FDE Cerakote, APAR700715M101 , MPN: APAR700715M101 , UPC: 840014617722 , Code: 29D-UFH-16CCMP-APAR700715M101
  • Aero Precision Complete Upper, M4E1-T, .350 Legend, 16in, RM16.6 Anodized, Black, APAR700705M101 , MPN: APAR700705M101 , UPC: 840014617708 , Code: 29D-UFH-16CCMP-APAR700705M101
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