Aero Precision M4E1 Stripped Lower Receiver - Black

SKU: APAR600001C
MPN: APAR600001C
Manufactured by Aero Precision
6 Reviews


Out of Stock


Out of Stock

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time can be 1-3 days.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to


The Aero Precision M4E1 Lower Receiver delivers billet aesthetics in a forged package. This enhanced forging is machined from 7075-T6 aluminum and compatible with all Mil-Spec AR-15 parts. A threaded bolt catch roll pin offers simpler installation of the bolt catch and virtually eliminates the possibility of damage to the receiver finish during installation (pin included). 1/16" Hex Key required for assembly. An integrated trigger guard eliminates the possibility of breaking the trigger guard tabs and an upper tension screw inserted in the grip tang of the lower receiver provides a fine tune adjustment for the fit of the upper and lower receiver.

  • Compatible with standard AR-15 components and magazines
  • Nylon tipped tensioning set screw
  • Threaded bolt catch roll pin (included)
  • Machined from 7075-T6 forged aluminum
  • Anodized black
  • Rear takedown pin detent hole is threaded for a 4-40 set screw
  • Weight: 8.61 oz

A threaded takedown pin detent recess allows easy installation of the takedown pin detent and spring with the use of a 4-40 set screw. Increased magwell flare aids in quick and efficient magazine changes. Marked and milled to accept short-throw safety selectors, but will work with standard selectors as well.

Aero Precision is known for superior engineering and machining. They push the boundaries of manufacturing and challenge the status quo by constantly looking for new ways to develop and evolve.


BrandAero Precision
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
Weight8.6 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

6 reviews

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My go to for maximum lower builds.

by -

Built my first AR with one of these. Not long after did I realize I should ONLY be shopping for these bad boys. After a few ponies I see how I've been spoiled by Aero. Hands down, this is now my go to for builds.
<br>You won't be sorry


by -

Flawless finish. Used this lower on an 11" AR pistol in 7.62x39 married to an Aero Precision upper receiver for flawless performance. The threaded set screw for the bolt catch lever and the rear take-down pin channel threaded for a 4-40 set screw (buy a pack of 8 for under $5 and use just enough torque), make those installs super easy (no more risk of a flying take-down spring). The integrated skeletal trigger guard is shooting glove friendly and eliminates the cost for an over-sized aftermarket trigger guard; plus, it looks cool. This is an incredible deal.

My go-to lower receiver


This is an excellent lower receiver. The threaded bolt catch roll pin has ruined me on lower receivers; I can never buy a different brand or model now! Fit my M4 upper receiver and Atlas S-One perfectly. Runs like a dream. Cannot recommend this item enough.

My Go-To Lower


Absolutely flawless fit and finish. Mates perfectly with an Aero M4E1 upper, producing a rifle that functions with buttery smoothness, and looks great doing it. As a bonus, p-mags drop free with only a push of the mag release button.

Deluxe lower for $100 or less


This new M4E1 lower is the best you can get in a forged lower. I will build my next two rifles (Valkyrie and Faxon 3 gun) with this lower. Every hole was perfect, beautiful finish on the smooth casting and nice trigger guard. I used a matching M4E1 upper om my Grendel build. Perfect line up. Looks billet with smooth edges.


by -

WOW!! Aero knocked this one out of the park. The billet look for the forged lower price. This lower looks incredible and will be purchasing aero products again in the future.