Springfield Armory High Capacity 16 Round XD-M 40 S&W Magazines are factory original stainless steel magazines. Factory original magazines are built to the exact specifications that they build the guns. There can be no regrets when buying a factory original part. Everyone can appreciate magazines with higher capacities. Reload less often, have more firepower at your disposal if necessary and feel safer with this extended magazine. Additional magazines are always a good idea, in a firefight people generally empty their magazines right away without even noticing, having another magazine can be the difference between life and death.