UBAR-9 Lower Receiver Hardware Kit

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Product Overview

So you want to build the strongest 3D-printable AR-15 lower receiver, now remixed into a 9mm PCC variant? Here's the hardware kit that you need. 

This lower design has been tested on various Bear Creek Arsenal, Aero EPC9, and Palmetto State Gen4 upper receivers for fit. Other uppers may require a bit of trimming of the lower to fit. 

Files are here


  • includes U-bolt, front and rear takedown pins, pin retaining clips, self-tapping grip screw, special front eye bolts/ nuts, steel ejector, and appropriate ejector and mag release screws
  • just add your lower parts kit like any other stripped lower
  • The front eye bolts are a very specialized piece of hardware that isn't really availible in bulk, thus the higher kit cost.

This is not a firearm, whole or partial.


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  • 5
    Great Hardware and quality

    Posted by Lone Lee on Sep 3rd 2022

    The quality is really great especially for the price! everything was included and there was even a couple extra pieces of the really small hard to lose items.






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