The Ghost Inc. Mother of All Baseplates (MOAB) has been designed to enhance your shooting experience. With its extra power magazine spring, rounded ergo design, positive magazine seating, and extraction traction points, youll notice the difference the MOAB makes right away.Features :Plus 6 Rounds of 9mm, Plus 5 of 40S&W/357 SIGFits GLOCK 19X/17/17L/22/24/31/34/35/37/45/47 OEM MagazinesExtra Power Magazine SpringRound Ergo DesignPositive Magazine SeatingExtraction Traction PointsDebris Extraction PortsSuperior Combat Tough Construction