M4E1 Alpine Dark Enhanced M-LOK Builders Set


FFL ITEM – Must be shipped to FFL Dealer!
M4E1 Receiver Set, Gen 2 Enhanced M-LOK Handguard, Weapon Works Cerakoted Alpine Dark

M4E1 Alpine Dark Enhanced M-LOK Builders Set

Alpine Dark Cerakote by Weapon Works

The Aero Precision M4E1 Alpine Dark Enhanced M-LOK Builders Set features a M4E1 stripped lower receiver, M4E1 Assembled Upper Receiver, and an Enhanced GEN 2 M-LOK handguard in your choice of either 9″ or 15″.  In addition, we have made available a very limited quantity of Alpine Dark cerakoted Magpul furniture; all custom cerakoted by Weapon Works.   The M4E1 Alpine Dark Enhanced M-LOK Builders set includes everything you need to begin the assembly of your own unique M4E1 firearm sure to impress your friends.

Check out all of our custom cerakoted builders sets here, or the M4E1 Alpine Dark ATLAS S-ONE Builders Set with ATLAS S-ONE Handguard.

M4E1 Lower Receiver Features
  • Threaded Bolt Catch Roll Pin – Allows for simple installation of the bolt catch and virtually eliminates the chance to damage the finish during installation (pin included). 1/16″ Hex Key required for assembly.
  • Integrated Trigger Guard – Eliminates the possibility of breaking the trigger guard tabs by integrating the trigger guard into the lower, creating a stronger more rigid platform to build upon.
  • Upper Tension Screw – Allows users to fine tune the fit of the upper and lower receiver using a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.
  • Threaded Takedown Pin Detent Recess – Allows user to easily install the Takedown Pin detent and spring with the use of a 4-40 set screw (no more launching detents across the room).
  • Increased Magwell Flare – Increased the flare of the magwell to aid in quick and efficient magazine changes.
  • Marked and milled to accept short-throw safety selectors, but will work with standard selectors as well.

Click to see the Magpul Alpine Dark Furniture Options

M4E1 Assembled Upper Receiver Features
  •  Integrated Barrel Nut – no special tools required
  •  M4 Feedramps
  •  .250 takedowns
  •  Includes installed dust cover and forward assist.
Enhanced Gen 2 M-LOK Handguard
  • 1pc free float design
  • Anti-rotational tabs
  • Continuous top rail
  • 1.78″ inside diameter
  • Compatible with low profile gas blocks
  • Quick disconnect sling sockets at 3,6, and 9 o’clock
Each Builders Set Includes
  • Alpine Dark Cerakoted M4E1 Stripped Lower Receiver
  • Cerakoted Dark M4E1 Assembled Upper Receiver
  • Alpine Dark Cerakoted Enhanced Gen2 M-LoK Handguard (9″ or 15″)
Optional Add-Ons
  • Toolcraft Bolt Carrier Groups
  • Charging Handles

Product Information

Manufacturer:  Aero Precision | Weapon Works
Platform:  AR15 – Multi Caliber
Material:  7075-T6 Aluminum (Receivers), 6061-T6 (Handguard)
Finish:  Cerakote | Alpine Dark
Handguard Type:  Enhanced Gen 2 | M-LOK
Handguard Actual Length:  9.22″ | 14.94″
Screw Torque:  25in-lbs

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Weight 1 oz
Dimensions N/A

Aero Precision, Weapon Works

Part Type

Handguard, Lower Receiver, Upper Receiver



Handguard Length

9", 15"

Coating Type



Alpine Dark

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