Rock Island Armory Magazine for Sig Sauer P320/M17 Features The Rock Island Armory ACT-MAG is built to drop directly into the Sig Sauer P320 and M17 full-size pistols without any modification giving owners a dependable fit matching factory specifications. Chambered in 9mm the magazine holds 10 rounds making it a good option for shooters in capacity-restricted states or anyone wanting a standard spare magazine for range use. A reliable magazine is one of the most important components of a defensive or duty pistol since feeding issues can compromise the entire system. Rock Island Armory builds its magazines to maintain consistent spring tension and feed lips for dependable cycling. Having an additional magazine on hand extends range time between reloads and provides a backup in case a primary magazine develops an issue. This magazine is a cost-effective way for P320 and M17 owners to expand their magazine inventory without paying factory OEM prices. Rock Island Armory has built a reputation for producing affordable functional magazines and components across a range of popular firearm platforms. For Sig Sauer P320 and M17 owners needing a dependable spare magazine this Rock Island Armory magazine is available for sale at GrabAGun. Rock Island Armory Magazine for Sig Sauer P320/M17 Specifications Manufacturer: Rock Island Armory Compatible Hosts: Sig Sauer P320 M17 Caliber: 9mm Capacity: 10 Rounds Available At: GrabAGun