The Armscor® ACT-MAG Sig P320 / M17 9mm 10-Round Magazine is an aftermarket magazine designed for proper fit and function with your Sig Sauer® P320 / M17 pistol. A polymer baseplate adds an additional layer of shock resistance that’s perfect for quick mag changes while a polymer follower and steel spring team up to provide smooth and reliable feeding. Steel construction and a corrosion-resistant finish provide unparalleled strength and long-lasting durability that’s ideal for the long-haul. If that’s not enough, this aftermarket Sig magazine is designed for a flush fit on full-size P320 / M17 pistols and it features factory-cut and numbered witness holes for quick round counts on the fly. Order today!