• Left Side Billet 80% AR-15 Lower Receive View
  • Threaded rear takedown slop tensioner bolt for billet 80% AR-15
  • Right Side Billet 80% AR-15 Lower Receiver View
  • Screw for use with billet AR-15 80% Lower Receiver
  • Image 5
  • Threaded rear takedown detent hole for billet AR-15 80% Lower Receiver

Sale! AR-15 80% Lower Receiver - Billet 6061 T6 - Black

$109.99 $89.99
(You save $20.00)


Limited Availability! Order Now!

Billet 6061-T6 80% AR-15 Lower Receiver. The receiver is MIL-A-8625 Type III, Class 2 Hard Black Anodized. These lower receivers are CNC machined to high tolerance mil-specs. 80% lower receivers are not considered firearms by the ATF, we can ship to your door. No FFL required. Lowers are sold and shipped by Modulus Arms.

Lower Receiver Features:

  • CNC Machined Billet 6061-T6 Aluminum
  • Black Hardcoat Anodized per MIL-A-8625 TYPE III CLASS 2
  • Pre-Milled Rear Shelf
  • Broached Magazine Well
  • Oversized Magazine Well flare
  • Integrated Trigger Guard
  • Two Finger Magwell Grip
  • Engraved Safety Markings
  • Safety Selector Stops
  • #5-40 Threaded Bolt Catch Pin
  • #5-40 Threaded Rear Takedown Pin Detent Hole
  • Upper Receiver Tensioner

* All 80% Lower Receivers sold and shipped by Modulus Arms are certified by the ATF as non-firearms.

Product Reviews

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  1. Nicest billet receiver I have found at a great price. 5 Star Review

    Posted by on 7th Feb 2017

    After completing my first lower receiver using the modules arms jig I wanted to make my next build special using better components. While researching the modules arms site for a jig I came across the AR-15 billet receiver on the site. The receiver was great, excellent price and just what I needed for an graded build. I plan to buy another while prices remain low.

  2. Nice 80% Billet Lower 5 Star Review

    Posted by on 30th Jan 2017

    This is one of the nicest billet lowers out there, with all the bells and whistles. Having the boltcatch pin and the rear takedown pin detent hole threaded is a major plus. My only minor complaint is that I had to retap the boltcatch hole; although the original threads were visible, they were not catching the provided pin. But I'll definitely buy more in the future. Competitively priced as well.

  3. Billet beauty 5 Star Review

    Posted by on 30th Jan 2017

    Hands down the nicest 80%er I have bought.

  4. Outstanding!! 5 Star Review

    Posted by on 28th Jan 2017

    The best lower on the market Outstanding!!

  5. Great lower!! 5 Star Review

    Posted by on 14th Nov 2014

    This is the lower I chose to do my first 80% project. It came out really well. Great product!!