The Aero Precision M4E1 Lower Receiver is forged with billet aesthetics. It is made of 7075-T6 aluminum for durability and is interchangeable with all mil-spec AR15 components. It has an integrated trigger guard that has been expanded for usage with gloves, as well as an upper tension screw to prevent rattling and play between the upper and lower receivers.
The magazine well has more flare than a Mil-Spec lower to help with rapid and efficient magazine swaps under stress. For ease of assembly and installation the bolt catch pin hole is threaded, as is the pin hole for the takedown pin detent. This model has a black hardcoat anodized finish and the selector markings are compatible with standard or short throw selectors.
The billet aesthetics of the M4E1 Lower Receiver are delivered in a forged package. This improved forging is made of 7075-T6 aluminum and is compatible with all mil-spec AR15 components. It has an integrated trigger guard and enlarged magwell flare, as well as a threaded bolt catch and take down detent pin holes for easier installation.
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- Brand: Aero Precision
- Category: Lowers
- Caliber: AR-15 compatible
- Model: M4E1
- Series: Stripped Lower Receiver
- Type: Lower Receiver
- Finish: Black Hardcoat Anodized
- Material: 7075 T6 Aluminum
- Gun Model: AR-15
- Gun Type: AR Platform
- Trigger: None
- Features: Threaded bolt catch pin hole
- Features: Threaded takedown detent pin hole
- Features: Upper tension screw
The billet aesthetics of the M4E1 Lower Receiver are delivered in a forged package. This improved forging is made of 7075-T6 aluminum and is compatible with all mil-spec AR15 components. Aside from the visual upgrades, this custom-engineered design provides features that challenge much more expensive billet options and simplify the assembly process for the at-home builder.
- 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.
- Stripped M4E1 Lower Receiver
- Nylon tipped tensioning set screw
- Threaded Bolt Catch Pin