LMT Defender Complete AR-15 Lower Receiver

Manufactured by Lewis Machine & Tool
Manufactured by Lewis Machine & Tool
1 Review

In Stock

NOTE: Limit 20 per household. Quantities exceeding 20 will not allow checkout.

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



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 .154� 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.
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BrandLewis Machine & Tool
Caliber Marking5.56 NATO
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

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Can't go wrong with LMT


Awesome lower!! installed a Larue trigger and a Geissele buffer string and weight. runs amazing!!