Aero Precision X15 AR-15 Gen 2 Stripped Lower Receiver

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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
Aero Precision Upper Receiver Assembled for AR-15 w/ Forward Assist & Dust Cover

Aero Precision Assembled Upper Receiver for w/ Forward Assist & Dust Cover


Improved AR-15 Lower For Easy Installation and Reliable Performance

The Aero Precision Gen 2 AR-15 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined and designed to mil-spec dimensions, this lower receiver works with standard AR15 components and ensure the highest quality with a correct component interface.

Gen 2 Improvements

  • Upper Tension Screw – Allows users to fine-tune the fit of the upper and lower receiver through the use of 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.
  • Increased Magwell Flare – Allows for easier insertion of magazines and provides a sleeker look.


  • Stripped AR15 Lower Receiver, Gen 2
  • Nylon tipped tensioning set screw


  • Shipping to FFL Dealer Required: Yes
  • Platform: AR15
  • Material: Machined from 7075-T6 forged aluminum
  • Finish: Anodized Black
  • Markings: “Cal Multi”
  • Compatibility: Works with standard AR15 components and magazines
  • Weight(s): 8.35oz

NOTE: Rear takedown pin detent hole is threaded for a 4-40 set screw

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 3 reviews
Robert Ratcliffe

First build also and it fit so well there was no need for the adjustment screw, but I tightened it anyhow.

Skip H.
First Build

This was my first lower build, couldn't be more happy with this receiver, great finish, all the parts fit perfectly, love the adjustment screw for snugging up the upper and lower. Can't wait to start another build, Aero is the way to go!

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

Todd Little
Awesome Lower, great base for any AR

Awesome Lower, great base for any AR

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