Sti International - Magazine Follower 2011 9mm, .38 Super, .40 S&W, .45 ACP

This follower for the STI 9mm, .38 Super, .40 S&W, and .45 ACP magazines is designed to lock the slide back. This is for the newer STI mags only. These magazines do have the caliber engraved on them and have witness holes on the back of the magazine.