AR15 80 Lower vs Completed Lower Receiver: Key Differences

One of the most common questions buyers have is the difference between an AR15 80 lower and a completed lower receiver.

The primary distinction lies in manufacturing completion. A completed lower receiver has undergone all required machining processes and is classified as a finished firearm component. An 80 percent lower, on the other hand, has not reached that final stage at the time of sale.

This difference affects how the products are sold, regulated, and transferred. While a completed lower receiver typically requires additional regulatory steps, an 80 lower is sold in an unfinished state under federal guidelines.

It’s important to note that laws can vary significantly by state and locality. Anyone considering an 80 percent lower should always review applicable regulations and ensure compliance before purchasing.

Clear information and responsible sourcing make a meaningful difference when choosing between these options.