Worried that a polymer lower receiver isn’t up to the task of handling your AR’s constant abuse? We’re excited to bring in the new Gen 2 Polymer 80% Lower from JMT! This ultralight receiver blank includes the necessary 80% jig for cutting and drilling the fire control cavity, and it includes beefed up designs and upgrades to ensure it’s truly battle-ready.
Stronger, Tougher Polymer
JMT took extra time to develop their reinforced polymer for this new 80% lower. Engineers incorporated a way tougher polymer-fiber construction that can withstand rapid fire, high heat, and the rigors of the high impacts, the hunt, or any 3-gun competition.
Considered 100% mil-spec, this polymer lower’s compatible with any “retail” AR components, including standard LPKs, buffers, and grips. JMT even cut the mag well to perfectly match your favorite Magpul magazines.
- 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).
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
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.