SDS Arms SDS Arms Checkmate 1911 Double Stack/2011 Handgun Magazine 9mm Luger 17/rd. Built for reliability smooth feeding and long-term durability it s the perfect replacement or spare mag for range days training and defensive use.Key Specifications for SDS Imports SDS Arms Checkmate 1911 Double Stack/2011 Handgun Magazine 9mm Luger 17/rd 6E664BC8: Manufacturer: SDS Imports Caliber: 9mm Luger Magazine Capacity: 17 Round Package Contents: SDS Imports SDS Arms Checkmate 1911 Double Stack/2011 Handgun Magazine 9mm Luger 17/rd Upgrade your 2011 MAC 1911 Double Stack or similar pistol with this Checkmate manufactured 9mm 17-round magazine. Built for reliability smooth feeding and long-term durability it's the perfect replacement or spare mag for range days training and defensive use.Key 80001513