Feel the difference the second you pick it up! The Polymer80 Lower Receiver features rock solid frame, injection molded from a fully automated system that was two years in the making.
This system is designed as a complete kit. There are NO expensive jig kits and parts to purchase - Polymer80's system is a COMPLETE, all-inclusive package in one price!
Older versions used some screws to hold the jig in place. That was changed in 2015 and this newest version does not come with or require screws to hold the jig together.