A new accessory for the SIG Sauer P320 as released by Strike Industries, the Spare Magazine Holder for SIG SAUER P320... "The Strike Industries Spare Magazine Holder for SIG SAUER P320 is designed to provide quick and easy access to a spare magazine, this holder can be mounted on most P320 grip modules with minimal effort. Equipped with locking retention for seamless mag changes, the holder is securely fastened to a Picatinny rail at a 5° forward angle.