The Lewis Machine and Tool Defender Complete AR-15 Lower Receiver is the perfect starting point for your next build. This AR-15 lower is forged from highly durable 7075 aluminum and has a hardcoat anodized finish. It is fully compatible with Mil-Spec lower parts, so you can swap every component to fully customize it to your liking. With commonly used trigger and hammer pin holes, your favorite trigger will drop right in. The LMT defender lower receiver is machined and finished with care, so that it functions as well as looks nice with no visible machining marks and a smooth even finish.


  • Forged 7075 aluminum
  • Hardcoat anodized
  • Mil-Spec AR-15 lower parts
  • Precise tolerances
  • Ergonomic pistol grip
  • M4 collapsible carbine stock

The Lewis Machine & Tool Defender AR-15 lower receiver comes fully finished with a Mil-Spec parts kit and smooth single stage trigger. It features an ergonomic pistol grip with an aggressive texture to keep your hand in place. It also comes with an M4 style carbine stock with 5 positions of adjustment on the buffer tube and a carbine buffer weight. Throw on a carbine upper receiver and you are ready for the range.

If you are looking to build a rifle with products trusted by law enforcement and military around the world, then look no further than Lewis Machine & Tool. The Defender lower receiver is the building block for your next reliable rifle that you will actually want to use.