Thanks for reaching out, Doug! The only 32 ACP magazine that Maglula explicitly says this accessory is incompatible with is the Beretta 81 Cheetah 32 ACP 12 round. As such, this mag feeder should be compatible with your Tomcat. You can learn more on the manufacturer's page: maglula.com/product/babyuplula-22lr-to-380acp.