Enhanced Magazine Plate (EMP) magazine extension adds two (+2) more rounds to your compact Glock's® magazine capacity and give you an extended gripping surface. Increases your firepower, while it gives you better control - and so better potential accuracy - when firing the pistol. Extended surface aids in smooth, fast, positive mag changes, too. Made of strong, impact-resistance molded hard polymer, with an aggressively "knobby" texture further enhances your hold on the pistol. Retains factory magazine spring.