An extension for the SHIELD ARMS 15 round magazines for GLOCK 43X & 48 (9mm). This extension replaces the magazine floor plate adding approximately 5/8" additional length resulting in better control and comfort without altering the capacity of the Shield Arms 15 round magazine. This extension incorporates the factory texture pattern as well as an ergonomic curve for better grip.**Fits SHIELD ARMS 15 round magazines only. If you have the factory Glock magazines see part PG-48. Works on all generation SHIELD ARMS 15 rnd magazines for GLOCK 43X/48.