Want the toughest, lightest, and most affordable 80% lower? Check out JMT’s new Gen 2 Polymer 80% Lower. It includes the required 80% jig for cutting the fire control cavity and drilling the holes for your hammer, safety, and safety lever.
High-Strength, Reinforced Polmyer
Even though this is a steal, this lower’s not a gimmick: JMT massively reinforced this lower with plenty of upgrades to ensure it can handle all the 5.56, .223 and 300 BLK rounds you throw down the muzzle. They even took their existing polymer-fiber material and made it tougher, stiffer, and stronger. It can handle high heat, rapid fire, and high impacts.
This 80% lower’s mil-spec with all fittings and threads and is 100% compatible with any standard AR-15 LPK, buffer tube or pistol brace, upper assembly, and magazine on the market.
- 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
80LowerJig.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.