The HK VP9SK Magazine Extension & HK P30SK Magazine Extension Conversion Kit is designed to increase the capacity of your 9mm 10-round magazines with an effortless installation. This kit is compatible with the HK VP9SK and P30SK 9mm pistols and provides an optimal ergonomic advantage for improved recoil control, allowing for a more comfortable and accurate shooting experience. The HK VP9SK Magazine Extension & HK P30SK Magazine Extension Conversion Kit includes everything necessary for a quick and easy upgrade, taking your factory HK 10-round magazine to a more practical 12-round capacity. In addition, this conversion kit utilizes the factory spring and body, ensuring reliable performance without additional adjustments. Made in the USA from high-quality materials, the XTech Tactical MTX line of extenders is unmatched for their reliability, ease of installation, and durability. This HK VP9SK Magazine Extension & HK P30SK Magazine Extension Conversion Kit will transform your 9mm 10-round magazines into a more versatile and functional accessory, enhancing your shooting experience. Note that this conversion kit is incompatible with CA, Cook County, IL, CO, MD, MA, NJ, NY, DC, CT, HI, VT, WA, or INTERNATIONAL. The factory spring and body are not included in the package, but the design is intended to work with the original HK factory magazine spring and body. Experience the difference and upgrade your HK VP9SK and P30SK magazines to a 12-round capacity today!