ProMag Handgun Magazine Drum Black Polymer For Glock 22 / 23 .40 S&W 50/rd

50-round drum magazine Fits the Glock Model 22/23 .40 S&W pistols Drum housing constructed of a proprietary DuPont Zytel based polymer Magazine upper tower has full length steel internal insert stamped and welded like the factory magazine Injection molded magazine follower Spring formed from heat treated stainless steel Made in USA