The polymer 80% lower receiver for your .308 platform is engineered and manufactured by James Madison Tactical (JMT) in the USA. This is not your average polymer 80 lower, in fact, The JMT .308 80% lower is fully engineered using current finite element structural analysis for reliable, long-term high performance.
POLYMER 80 versus ALUMINUM
After much research in polymer .308 lowers, JMT created its own formula of hybrid polymers and fibers with additional reinforcements in high stress areas to bring you the best .308 lower on the market today. All of the JMT polymer 80 lowers are engineered to Mil Spec tolerances and because it is fashioned from extremely durable fiber polymer materials there are no concerns about corrosion as you may find in aluminum .308 lowers.
- Extended upper fire control box sections.
- Upper left magazine well box section.
- Webbed magazine wells L & R side (matched for MagPul) magazines.
- Extended bolt release roll pin posts.
- New JMT Gen2 logo markings.
- DPMS Compliant
Instructions and tooling list must be downloaded from the manufacturers website.
Returns will not be accepted once the receiver is modified in any way. All warranty issues will be directed to the manufacturer.
Big Book Catalog, Issue:72, Page:009