AT15 Billet Lower Receiver

5 5 1 Product

This item may be in stock but is not available for online ordering
please call 403-277-7786 or 403-277-7266
or email to purchase

Gen4's Now Available


This is the highest quality AR lower available in Canada. They are CNC machined from billet 7075-T651 aluminum as opposed to cast from 6061 aluminum. This has allowed us to tighten up our tolerances considerably over a standard forged lower and has allowed us to employ several features not available in most "off the shelf" AR's.  The magwell is EDM'd for flawless feeding and magazine fit with the Magpul PMag and CAA mags and features a generous flare for faster, easier mag changes. An adjustable spring loaded tensioning device has been placed under the rear take down pin to ensure the tightest possible fit between the upper and lower receivers. The finish is Mil-Spec Type III hardcoat anodizing. A couple of features we have added to our lower receivers are the rear takedown spring and detent are captured. We have employed a ball bearing for the safety as opposed to a sharp brass detent for smoother operation of the safety. We have also captured the safety ball bearing and spring with a set screw which allows you to adjust the stiffness of the safety. Our Gen 4 lowers have a built in ambi bolt release for getting "back in the action" faster between reloads.
Our Gen4 lowers are only shipped as an assembled lower and are available with standard Mil-Spec LPK, RRA two-stage trigger or Timney match trigger. We can also source JP and Geissele triggers. If you have a trigger group or LPK you would like to use, we do not charge to install it. With some of the features we have employed and additional parts and fitting required, we want to ensure your Gen 4 lower is functioning flawlessly before it leaves our shop. We are now selling our Gen4 uppers and lowers as a matched set for the tightest possible fit.

  • 7075-T651 aluminum
  • Tight tolerances
  • Flared magwell
  • Texturing at front of magwell
  • Tensioning bearing at back of receiver for tight fit
  • Ambi bolt release comes standard
  • Ambi safety and ambi mag release available
  • Adjustable ball bearing safety
  • Captured safety and rear takedown pin springs and detents
  • Available in matched set with ATRS upper
  • Several safe/fire markings available

stripped lower w/ customer supplied LPK installed - $550

w/Mil-Spec LPK - $685

w/RRA - $910

w/Timney - $1015

Dealer Pricing Available

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This item may be in stock but is not available for online ordering
please call 403-277-7786 or 403-277-7266
or email to purchase
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