This 10-round single feed magazine fits the Ruger American® Ranch Rifle and AR-556® MPR platforms chambered in .350 Legend. The 410 stainless steel body provides strength and durability while the POST & HOLE™ adds strength, durability and robotically-welded precision. The mags LIPLOCK™ technology keeps rounds secured and aligned. The Advanced Geometry Follower™ remains level for consistent feeding while the EVERFLEX™ anti-fatigue spring technology ensures long life and reliability. The magazine is finished in a T-360™ total coating technology for enhanced performance & cleaning. This DURAMAG™ magazine is made in the USA by C Products Defense®.