2011 .45 ACP complete magazines suit USPSA Single Stack, Limited, and IDPA shooters running 2011-pattern pistols chambered in .45. Pre-assembled with spring, follower, and base pad installed, they are ready to load and run straight from the box. Options include 2011 .45 ACP magazines in single-stack and extended double-stack capacities, with steel and polymer body choices, built for dependable feeding with hardball and match loads. Fast same-day shipping on most orders at Shooters Connection.