Aero Precision M4E1 Stripped Lower Receiver

The Aero Precision M4E1 Lower Receiver delivers billet aesthetics in a forged package. This custom-designed enhanced forging is machined from 7075-T6 Aluminum and compatible with all mil-spec AR15 parts. Aside from the visual upgrades this custom engineered design provides that challenge much more expensive billet options, Aero has added several functional features to the lower receiver to simplify the assembly process for the at home builder.

M4E1 Lower Receiver Improvements:

• Threaded Bolt Catch Roll Pin—This pin allows for simple installation of the bolt catch and virtually eliminates the chance of damaging the finish during installation (pin included). A 1/16″ Hex Key is required for assembly.
• Integrated Trigger Guard—By integrating the trigger guard into the lower, the possibility of breaking the tabs is eliminated, creating a stronger, more rigid platform to build upon.
• Upper Tension Screw – This 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 users 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.

Includes:

• Stripped M4E1 Lower Receiver
• Nylon tipped tensioning set screw
• Threaded Bolt Catch Pin

Frequently Asked Questions:

• What material is the Aero Precision M4E1 Stripped Lower Receiver made from?
  The M4E1 lower receiver is machined from 7075-T6 forged aluminum.
• What is the difference between the M4E1 and a standard AR-15 lower receiver?
  The M4E1 features an enhanced design with an integrated trigger guard, threaded bolt catch pin, and a flared magwell for easier reloading.
• Is the Aero Precision M4E1 compatible with all AR-15 parts?
  Yes, it is fully compatible with standard AR-15 components and upper receivers.
• Does the M4E1 lower receiver require assembly?
  Yes, it is a stripped lower receiver, so it requires a lower parts kit, trigger, and stock to complete the build.
• Is the M4E1 Stripped Lower Receiver anodized?
  Yes, it comes with a black hard-coat anodized finish for durability and corrosion resistance.
• Can the M4E1 lower receiver be used for a pistol build?
  Yes, as long as it is registered and built as a pistol in accordance with local, state, and federal laws.
• What type of buffer tube does the M4E1 lower receiver accept?
  It accepts standard Mil-Spec buffer tubes.
• Is the M4E1 lower receiver multi-caliber?
  Yes, it is designed for multi-caliber use, allowing it to work with various AR-15 calibers like .223/5.56, .300 Blackout, and others.
• Does the Aero Precision M4E1 come with a trigger guard?
  Yes, it has an integrated trigger guard, eliminating the need for a separate trigger guard piece.
• What is the weight of the M4E1 Stripped Lower Receiver?
  It weighs approximately 8.61 oz.
• Is the M4E1 lower receiver compatible with Aero Precision’s M4E1 upper receivers?
  Yes, it is designed to pair seamlessly with Aero Precision M4E1 upper receivers.
• Does the M4E1 feature a tension screw for reducing upper receiver wobble?
  Yes, it includes a tension screw to eliminate any play between the upper and lower receivers.
• What is the magwell design on the M4E1 lower receiver?
  The magwell is flared for faster and easier magazine changes.
• Is the Aero Precision M4E1 Stripped Lower Receiver legal to purchase?
  Yes, it is legal to purchase in most states, but check your local laws as some states have restrictions on lower receivers.
• What warranty does Aero Precision provide for the M4E1 lower receiver?
  Aero Precision offers a limited lifetime warranty covering defects in materials and craftsmanship.