Aero Precision M4E1 AR-15 Stripped Lower Receiver, CAL MULTI (7075-T6 Forged Aluminum)
This Aero Precision M4E1 stripped lower receiver is an AR-15–pattern lower marked "MOD M4E1" and "CAL MULTI" with Aero Precision LLC / Tacoma, WA markings. It is a receiver-only lower (not a complete firearm as pictured) and features an integrated trigger guard and a flared magwell. The buffer tube threads are visible, and this lower is built from 7075-T6 forged aluminum.
Condition
Overall Condition: Very Good
Bore Condition: Bore is bright and clean.
Finish Condition: Very Good
Mechanical Condition: Very Good
Specific Condition Notes: The receiver shows some markings from previous handling/use. Refer to pictures.
What’s Included
- Aero Precision M4E1 stripped lower receiver (CAL MULTI)
This is the Aero Precision M4E1 series lower receiver in the AR-15 platform, configured as a stripped lower receiver. It includes M4E1 design elements such as an integrated trigger guard and a flared magwell, along with visible buffer tube threads.
Factory-documented M4E1 features referenced for this receiver include a threaded bolt-catch pin system, an upper tension screw system, a threaded takedown-pin detent recess, and compatibility with short-throw selectors. The factory listed receiver-only weight is 8.61 oz.
Markings on the receiver include "MOD M4E1" and "CAL MULTI" along with Aero Precision LLC / Tacoma, WA. Country of origin is the United States, and the receiver material is 7075-T6 forged aluminum.
Note: The following items were provided as additional requested details but are not included with this sale: Aero Precision M4E1-T 16in RM15 Complete Upper, Rise Armament LE145 4.5Lb Single Stage Upgraded Trigger, and Maxim Defense Stock.




