The HK VP9 and P30 9mm +2 conversion kit is designed for seamless compatibility with VP9 and P30 15-round factory magazines, allowing for installation within seconds. This kit enables a swift conversion of the factory magazine capacity from 15 to 17-round. It has demonstrated high reliability when used with the HK factory magazine spring and body. Xtech Tactical's MTX series of extenders are unparalleled in terms of reliability, ease of installation and durability. For compatibility with 9mm 15-round magazines, ensure the utilization of the original factory spring The factory HK magazine is designed to increase its capacity from 15 - 17-rounds, enhancing its functionality and providing users with additional ammunition storage The installation process is straightforward and requires no tools, ensuring a hassle-free setup that is both efficient and user-friendly Manufactured in the United States of America Utilizes the original factory-installed spring and body components, ensuring compatibility and maintaining the integrity of the manufacturer's design