GHOST MOAB MAG EXTENSION FOR GLOCK GEN 1-5 PLUS 6 RNDS BLUE FEATURES: Adds 6 Rounds to 9mm and 5 rounds to .40acp 7 .357 Glock's Magazines! Works on 19X, 17, 17L, 22, 24, 31, 34, 35, 37 & 45 Stainless steel extra power magazine spring included Rounded ergo design Positive mag seating Extraction Traction Points Debris extraction ports Superior tough construction No more painful corner spikes in your palm