Aero Precision EPC-9 AR 15 Lower Receiver – Glock Magazine Compatible

Click Here for Price
Out of Stock

This item is regulated, therefore your entire order will be shipped to an FFL dealer of your choosing. After you place your order, we will contact you to finalize these details.

Orders will Ship within 1 Business Day
AT3™ Enhanced Lower Parts Kit with Nickel Teflon Trigger and Magpul MOE Grip

AT3™ Enhanced Lower Parts Kit with Nickel Teflon Trigger and Magpul MOE Grip


Enhanced 9mm AR Lower Receiver for Pistol Caliber Carbines

Before you ask – yes, it does take Glock mags.  The EPC-9 offers enhanced ergonomics, simple installation, and unbeatable aesthetics for a pistol caliber AR-15 build.  The flared magwell is sized for 9mm or .40 S&W Glock pattern magazines, and comes pre-installed with a proprietary magazine catch and ejector.  Get your complete build started with the EPC-9 threaded upper receiver.

Like Aero’s M4E1 lower, the EPC-9 features a threaded bolt catch roll pin that offers a simpler installation of the bolt catch, and virtually eliminates the possibility of damage to the receiver’s finish during installation. All you’ll need is a 1/16″ Hex Key to assemble the bolt catch..

Easy to Assemble

Simple Assembly and Broad Compatibility

The EPC-9’s assembly process has been simplified from standard lowers.  The built-in trigger guard eliminates the possibility of breaking tabs found on standard lowers. The upper tension screw inserted in the grip tang of the lower receiver allows for fine adjustment for the fit of the upper and lower.

The threaded takedown pin detent recess allows easy installation of the takedown pin detent and spring with the use of a 4-40 set screw. The flared magwell increases the speed of reloads under stress by broadening your margin for error.

The EPC-9 accepts standard or short-throw safeties, and the pictograms are visible from either side.  Perfect for ambidextrous safeties.

Features And Improvements:

  • 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
  • Upper Tension Screw – Allows users to fine-tune the fit of the upper and lower receiver using a nylon tipped tensioning set screw. This provides a tight fit with any standard AR15 upper receiver.
  • Threaded Takedown Pin Detent Recess – Allows the 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.
  • Built-in Ejector for Glock compatible Bolt Carrier Groups


  • Shipping to FFL Dealer Required: Yes
  • Platform: EPC-9
  • Material: Machined from 7075-T6 forged aluminum
  • Finish: Anodized Black or FDE Cerakote
  • Markings: “Cal Multi”
  • Compatibility: Works with Glock Magazines for 9mm and .40 S&W
  • Weight: 12.8 oz


  • Rear takedown pin detent hole is threaded for a 4-40 set screw.
  • Threaded Bolt Catch Roll Pin (Included).

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.

Products available on this page:

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Aero Precision Warranty

If for any reason you have a warranty issue with one of our products, please contact us at 253-272-8188.

Please describe your situation, include your name and order number or transaction id. One of our technical specialists will then review your claim and contact you within 3-5 business days.

If you have images to send, please email them to

Damaged Items

In regards to claims dealing with damaged or blemished products, we ask that you create a Help Desk Ticket on your My Account page. If you don’t have an account with us, please go to the Contact Us page and fill out the form for review within 72 hours upon receiving the shipment.

If you have images to send, please email them to

Failed Background Check

There will be a 30% restocking fee on all lower receivers returned because of failed background checks.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 4 reviews
Bradford Porter
Feeding problems

Glock magazine does not fit high enough in the magwell to allow the upper feeding mechanism to remove a round from the magazine and feed it into the barrel. Need to machine magwell so glock magazine can be pushed up higher to feed rounds.

Aero EPC-9

To me it seems like really nice quality work definitely like the flared mag well

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Jon Place
pcc lower

flawless looks great assembled easily i am truly impressed with every thing
i would buy another but she might not be happy

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Warren Brogren
Best one yet

I've built a few 5.56 rifles with different lowers. This is my first 9. I decided to go with aero on this build. I'm glad I did. This thing is so precisely made and the finish is flawless. I like it so much that I bought the upper. If you want to do it right, this is the way to go. Getcha some.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.