Introducing the first Magpul metal mag: the AMAG 17 SG9 for SIG Sauer P320 and M17 pistols. The AMAG 17 SG9 is a 17-round SIG 9mm handgun magazine featuring a body made from a low-friction steel alloy, eliminating corrosion while using optimized rib structures for correct round stacking, in turn promoting positive, reliable feeding.