ProMag Standard 10rd 22 LR Fits Colt M4 Black DuPont Zytel Polymer COL27

This Magazine from ProMag has a body constructed of proprietary DuPont Zytel based polymer. It features an injection molded magazine follower and a spring formed from heat-treated chrome silicon wire. Fits Colt M4.22LR rifle;Magazine body constructed of a proprietary DuPont Zytel based polymer;Injection molded magazine follower;Spring formed from heat treated chrome silicon wire;Does not fit Ciener and G.I. style .22 conversion rifles Manufacturer Part Number: COL27