Aero Precision AR15 M4E1 Complete Rifle, 16″ 5.56 NATO



The Aero Precision M4E1 16″ 5.56 Complete Rifle is built on the popular Enhanced Series Upper Receiver. This system features a custom integrated upper receiver and handguard platform that provides the shooter a light-weight, free-floated, rigid design resulting in superior performance and accuracy.

All complete rifles are assembled by professional gunsmiths and are tested prior to leaving our facility. Buy with confidence when you purchase an Aero Precision Complete Rifle.


Local Pickup: Customers that order FFL Items (firearms or other serialized items) and select “Local Pickup” as their delivery method will be required to complete a Form 4473 and background check prior to taking possession of their order.  All firearms or FFL Items that are purchased from Western Mountain Sports have Form 4473 and NICS checks included, there is no additional fee to complete this process. 

Shipping: Federal law requires this product to be transferred through a licensed FFL dealer. Western Mountain Sports requires a copy of the dealer’s FFL for verification and shipping. It’s the customer’s responsibility to notify the dealer of the order and to ensure their chosen FFL will accept the transfer. For more information, please see our Shipping & Local Pickup policy.


Additional information

Shipping to FFL Dealer Required



Semi-Auto Direct Impingment


5.56 NATO / .223

Twist Rate

1/7 Button Rifled

Barrel Type

Government Profile

Barrel Length


Barrel Material

4150 CMV

Barrel Finish

QPQ Corrosion Resitant Finish


Gen 2 Enhanced 12", Gen 2 Enhanced 15"

Receiver Material

7075-T6 forged aluminum

Muzzle Device

Standard A2 Flash Hider

Bolt Carrier

M16 Cut, 8620 Steel, Phosphate Finish,

Gas System

Mid-Length with Low Profile Gas Block


Magpul STR Stock


Standard Mil-Spec AR15/M4 Buffer Kit


Magpul MOE Pistol Grip


Right Hand


30rd PMAG