Real time inventory.  No backorders.

JMT AR-15 80% Gen 2 Polymer Lower with Jig - FDE



JMT’s Gen 2 Polymer 80 Lower, now shipping in Flat Dark Earth, is the perfect way to complete that ultra-light performance AR build with a receiver that perfectly matches your Magpul furniture! This polymer receiver blank ships with it’s own jig to drill the hammer, trigger, and safety pin holes and cut the fire control cavity. 

Upgraded Polymer

JMT beefed up the lower with numerous physical reinforcements to ensure it’s as tough as an aluminum receiver. They also took their existing polymer-fiber material and made it tougher, stiffer, and stronger. This receiver’s truly capable of handling rapid fire, high heat, and high impacts in any environment.

Mil-Spec Construction

It’s also compatible with all mil-spec AR parts, including a standard LPK, buffer tube or brace, grip, and of course, your favorite Magpul magazines, cut to match. Pair this lower up with any 5.56/.223 or 300 BLK components and complete your build with confidence.

Upgraded Features:

  • Extended upper fire control box sections.
  • Upper left magazine well box section.
  • Webbed magazine wells match Magpul mags.
  • Extended bolt release roll pin posts.
  • New JMT Gen2 logo markings.

No FFL is required to purchase this lower receiver. This polymer 80% lower receiver is not considered a firearm and is compliant with ATF receiver blank determinations (Gun Control Act of 1968). Not classified as a firearm as defined in 18 U.S.C. 921(a)(3).

Made in the USA  Lifetime Warranty

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or “assault weapons” (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily

80LowerJig.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.