The XGRIP XGSWMP Magazine Spacer adapts full-size Smith & Wesson M&P 9/40 magazines for use in compact pistols seamlessly incorporating the larger magazine into the compact's grip while increasing capacity.XGRIP Magazine Spacer Model XGSWMPCompatible with S&W M&P 9/40 Compact pistolsAdapts full-size M&P 9/40 magazines for compact frameIncreased magazine capacityImproved comfort control and accuracySecure fit and reliable performancePerfect for M&P owners who want the compact size for carry while maintaining the option to use higher-capacity full-size magazines when needed providing enhanced versatility and shooting performance.