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Carbon 50 .308 80% Lower Receiver with FREE machining jig - Black
Carbon 50 .308 80% Lower Receiver

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Our Price: $115.00

Quantity in Stock:93
Product Code: CARBON308LOWER-BK

Now available, the long-awaited Carbon 50 308. By using a high percentage of carbon fiber strands combined with high temp polymers, our Carbon 50 composite lowers are in a league by themselves. After milling out the Fire Control pocket, the 308 weighs in at a mere 5.6 oz. resulting in a 20% weight savings and a stiffer, stronger frame ensuring a lighter performing rifle. A very limited Supply is available.
Key enhancements include:
  • 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

The 80% lower receiver for your .308 platform is engineered and manufactured by James Madison Tactical (JMT) in the USA. The JMT Carbon 50 .308 80% lower is fully engineered using current finite element structural analysis for reliable, long-term high performance.

JMT uses only the best high quality hybrid carbon/composite materials, advanced engineering, precision manufacturing and stringent quality controls. This way you can trust it not only in the harshest field environments but for personal protection as well.

The Carbon 50 .308 80% lower is designed specifically to Mil Spec tolerances for a high level of interchangeability with other Mil Spec .308 parts and accessories on the market today. This is achieved through current technology and computer aided manufacturing processes combined with exacting quality control procedures.

How you decide to defend and protect yourself and your family is a personal matter. No one wishes to experience a personal breach of your safety or a home invasion but it does happen. The mission at JMT is to give you the assurance in a product you can trust.

The operations left to be completed to complete your JMT .308 80% lower are as follows: fire control group, trigger pin, hammer pin, trigger slot and the safety selector hole. This is a not an FFL item. This is not a complete receiver and still requires machining to be done.


This item cannot be shipped or sold out of the United States.

This item is not available for purchase to Washington State residents.