Samson M&P Contour Magazine Extension Gray. The +3 Mag Extension not only allows you to carry more ammo it also aids in your ability to clear malfunctions faster. The +3 Mag Extension drops free quickly keeping you in the game with speedy reloads. The perfect accessory for the M&P9. Specifications for Samson M&P Contour Magazine Extension: Manufacturer: Samson Magazine Capacity: 3 Round Features of Samson M&P Contour Magazine Extension For the M&P9 Provides +3 cartridge capacity Designed to drop free without catching on the shooter's hand Relief cuts to aid in extracting magazine to clear Type III (double-feed) malfunctions and for one handed malfunction clearing Leading edge is contoured to facilitate one-handed reloads Uses factory magazine spring Package Contents: Samson M&P Contour Magazine Extension Samson 04-06039-11: M&P Contour Magazine Extension Gray