The James Madison Tactical Polymer 80% Jig and Lower is a high-quality, durable solution for completing an 80% lower receiver in a lightweight, polymer material. This jig is specifically designed for ease of use, providing a straightforward, efficient process for building custom lowers. The polymer construction ensures both strength and reduced weight, making it an ideal choice for those looking for a durable and affordable option. The jig includes clear alignment guides and pre-marked templates, making it accessible to both novice and experienced builders. With the James Madison Tactical Polymer 80% Jig and Lower, you can achieve a precise, reliable build for your AR-15 or other compatible platforms, all while maintaining the flexibility and performance of polymer construction.