Alpha-Xi / XiP Pouch - Single Stack AdaptorThe Alpha Xi XiP Mag pouch is designed wide enough to hold most double Stack magazine, and supplied with 3 sets of spacers to fit a wide variety of those magazines. Single Stack 1911 shooters who wish to use these pouches too, and take advantage of their unique features and performance can now do so, thanks to this optional Single Stack Spacer, sold separately. This Spacer slides into the pouch rail as the other spacers do, and enables the height