Aero Precision M4E1 PRO Stripped Lower Receiver – Black
The Aero Precision M4E1 PRO Stripped Lower Receiver – Black brings advanced engineering and precision craftsmanship to your next AR-15 build. Forged from 7075-T6 aluminum and CNC-machined to tight tolerances, this stripped lower sets a new standard for strength, modularity, and fit. Its black hardcoat anodized finish meets MIL-A-8625F Type III Class 2 specs for long-lasting durability in any environment.
This lower features integrated pockets for the bolt catch and magazine release, simplifying installation and supporting standard Mil-Spec components. A flared magwell enhances reload speed, while the slightly widened rear takedown pin area ensures a tight, consistent fit with any Mil-Spec upper receiver.
What sets the M4E1 PRO apart is its built-in M-LOK-compatible interface, offering direct accessory attachment at the receiver level—an industry-first innovation. A reinforced trigger guard opening accommodates gloved operation, and the enhanced rigidity built into the lower’s geometry helps reduce flex and improve consistency under recoil.
Weighing just 8.61 oz, the M4E1 PRO offers a lightweight platform without sacrificing strength or stability, making it ideal for duty use, competition builds, or custom rifles where performance is a priority. This lower is fully compatible with all standard AR-15 components and follows strict Mil-Spec 1913 dimensional standards for seamless integration.
- Compatibility: Works with all standard AR-15 upper receivers and components
- Magazine Well: Flared for faster reloads
- Trigger Guard: Reinforced and oversized for gloved use
- Accessory Mounting: Integrated M-LOK slots at the receiver
Proudly made in the USA and backed by Aero Precision’s lifetime warranty, the M4E1 PRO Stripped Lower Receiver is the ideal base for shooters seeking innovation, compatibility, and superior performance in a lightweight package.
Product Information
| Weight | 8.61oz |
|---|---|
| Manufacturer | Aero Precision |
| Platform | AR15 |
| Series | M4E1 |
| Compatibility | Standard AR15 components |
| Finish | Anodized |
| Color | Black |
| Material | 7075-T6 Aluminum |
| Markings | "Cal Multi" |
| Made in USA | Yes |
We fully comply with all federal, state, and local laws regarding the sale of restricted products. We do not market or sell to prohibited jurisdictions, and any attempts to induce illegal activity, including by law enforcement or government agencies, will be rejected and may be reported. All orders are subject to legal verification, and those in violation will be canceled. By using this site, you confirm compliance with all applicable laws.
Important!
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Review our FFL Ordering Instructions HERE before placing your order.
- Prices do not include your dealer’s transfer fees.
- Not eligible for return after transferred into your possession via ATF Form 4473.
- There will be a 30% restocking fee on all controlled items returned because of failed background checks.
Federal law requires that you be 21 years of age or older to purchase a pistol, stripped receiver, or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver, not a handgun or long gun. However, they are still “firearms” by definition and are subject to the same GCA limitations as any other firearm. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21.
Arm or Ally is a stocking dealer for all Aero Precision, Faxon Firearms, Ballistic Advantage, HOLOSUN, Toolcraft, Elftmann Tactical, Timney, TriggerTech, HIPERFIRE and was named the #1 Overall E-Commerce Dealer for Aero Precision Products in 2020!
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