Cross Armory Lower Parts Kit for Glock 17 & 19 as well as your Polymer 80 build. Includes all the parts you need to complete you lower reciever. Includes the following Complete Trigger with Polymer trigger shoe 5.5# Connector 3 Pin set Extended Magazine Catch Extended Slide Lock Extended Slide Stop Magazine Catch Spring Slide Lock Spring for G17 Slide Lock Spring for G19 Mfg: Cross Engineering Llc
