Convert your standard AR-15 PMAG® magazine into a reliable AR-style 9mm magazine with the CMMG® 9mm AR-15 PMAG Magazine Adapter 3-Pack from GunMag Warehouse. Compatible with standard AR-15 lower receivers, this drop-in adapter kit allows you to safely and reliably feed 9mm ammunition with your standard AR-15 magazines and includes a high-tensile steel wire spring, 9mm polymer follower, and replacement floor plate. Better yet, this conversion kit offers quick, tool-free installation for reliable field service, right out of the box. 3-pack.