Aero Precision M4E1 Complete Upper, 18″ 6mm ARC Rifle-Length Heavy Barrel, 15″ Enhanced M-LOK Handguard – Anodized Black

Aero Precision M4E1 Complete Upper, 18″ 6mm ARC Rifle-Length Heavy Barrel, 15″ Enhanced M-LOK Handguard – Anodized Black

Build a better AR-15 without the hassle of assembling an upper from scratch. This M4E1 complete upper from Aero Precision comes assembled with a 18″ 6mm ARC barrel running a rifle-length gas system and a 15″ Enhanced M-LOK handguard, all finished in durable Anodized Black. It installs on any mil-spec AR-15 lower receiver in minutes.

6mm ARC brings long-range precision to the AR-15 with fast, flat-shooting 6mm bullets and very manageable recoil.

Key Features

• M4E1 Enhanced design: the receiver and handguard are made to work together, reducing flex and creating a seamless top rail.
• 15″ Enhanced M-LOK handguard: a free-floating M-LOK handguard that mates with Aero’s enhanced receiver design for a rigid, gap-free fit.
• Heavy barrel: extra mass for stability and consistent shot-to-shot performance.
• Made in the USA by Aero Precision in Lakewood, Washington.

Specifications

• Brand: Aero Precision
• Platform: AR-15
• Series: M4E1
• Caliber: 6mm ARC
• Barrel Length: 18″
• Gas System: Rifle-Length
• Handguard: 15″ Enhanced M-LOK
• Forward Assist: Yes
• Finish: Anodized Black
• Made in USA: Yes

Installation

Make sure the firearm is unloaded. Open the pivot and takedown pins on your AR-15 lower, seat the upper’s front lug in the pivot pin hole, close the receivers and push both pins home. Insert your charging handle and bolt carrier group, then perform a full function check before live fire. If you are unsure at any step, have a qualified gunsmith complete the installation.

Compatibility

Designed for mil-spec AR-15 lower receivers, including Aero Precision M4E1 and standard AR-15 lowers. 6mm ARC shares the Grendel case head, so it needs a Grendel/ARC bolt and 6.5 Grendel/6mm ARC magazines.

Frequently Asked Questions

Does this complete upper include a bolt carrier group and charging handle?
No. Like most Aero Precision complete uppers, it ships without a bolt carrier group and charging handle, so you can choose the BCG and charging handle that suit your build.

Will it fit my lower receiver?
Yes, it is built to mil-spec dimensions and fits standard AR-15 lowers, including Aero Precision M4E1 lowers.

What bolt and magazines do I need?
6mm ARC shares the Grendel case head, so it needs a Grendel/ARC bolt and 6.5 Grendel/6mm ARC magazines.

Does it ship to my state?
Some states and localities restrict certain firearm parts. It is the buyer’s responsibility to confirm the item is legal where they live before ordering.

Disclaimer

Aero Precision, M4E1, ATLAS, R-ONE and S-ONE are trademarks of Aero Precision. Leupold and VX-Freedom are trademarks of Leupold & Stevens, Inc. Specifications and pricing come from the manufacturer and may change without notice. Product images are for illustration. The buyer is responsible for complying with all federal, state and local laws.