M4E1 Assembled Upper Receiver 5.56 Mid-Length - M4E1 5.56 NATO Assem Uppr Rcvr M4 14.5" Bbl Mid-Length Black
All Aero Precision upper receivers
Click to see full view
Aero Precision
Overview
The Aero Precision M4E1 Assembled Upper Receiver is a complete upper designed for the AR-15 platform and features a 14.5-inch barrel chambered in 5.56 NATO, making it a versatile choice for a variety of shooting applications. With a mid-length gas system, this upper provides a smoother recoil impulse and enhanced reliability, particularly when paired with the right components. This upper receiver is commonly found in builds that prioritize the mid-length gas system and 5.56 NATO caliber, making it ideal for both competitive shooting and tactical use.
Specifications
M4E1 Assembled Upper Receiver 5.56 Mid-Length - M4E1 5.56 NATO Assem Uppr Rcvr M4 14.5" Bbl Mid-Length Black
September 2026 on GunPartPicker
Aero Precision M4E1 Assembled Upper Receiver 5.56 Mid-Length - M4E1 5.56 NATO Assem Uppr Rcvr M4 14.5" Bbl Mid-Length Black ranked #267 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #961 of the 1,713 upper receivers builders have added.
It was out of stock everywhere we track for all of September 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $529.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which upper receiver to pick?
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
Frequently Built With
Popular alongside upper receivers on GunPartPicker
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Bravo Company M16 Bolt Carrier Group Black
Magpul AFG-2 Angled Fore Grip - Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
No reviews yet. Be the first to review this product!