Factory mag that fits perfectly. - Springfield Armory XD-S 9mm 9 Round Magazine w/ Sleeve for Backstrap

This mag is a perfect addition to my XDS. The gun came with 8 round and 7 round mags when purchased, but I wanted a magazine with more capacity. This mag is exactly what I wanted. The plastic sleeve that comes on the mag actually extends the handle of the gun, which gives the handle of the gun more for me to grip and made the handle more comfortable. I went ahead and purchased another mag because I liked it so much.