Shield Arms S15 magazine with +5 extension, 20 round capacity, GEN 3, for GLOCK 43X and 48.

Shield Arms, S15 Magazine, 9MM, Gen 3, 20 Rounds, Fits Glock 43X/48, Nitride Finish, Black, with +5 Extension.  Note: this magazine must be used with a Shield Arms steel magazine release.
Unique easy access floor plate
Index cuts on the extension body
Adds 5 rounds to Shield Arms S15 Gen 3 magazine
12 coil plus power spring
Proudly made in the USA
Fits most aftermarket flared mag wells