ProMag GLKA11 Standard 13rd 40 S&W Compatible w/Glock 23/27 Black DuPont Zytel Polymer

The Pro MAg magazine is compatible with your Glock 23/27. It is constructed of DuPont Zytel polymer with full length steel internal insert, injection molded mag follower and mag spring formed from chrome silicone wire. Made in the USA.