Because adding two more rounds could be the difference between mission success and failure, the HK VP9 17 round conversion kit allows you to do just that without the need to buy another magazine. This conversion kit from Omaha Outdoors transforms your 15 round mag into a 17 rounder and includes the floorplate, locking plate, spring, and follower you need to complete the alteration. The HK VP9 17 round conversion kit is an OEM part made to fit your factory mag seamlessly. It features a low profile for snag free operation and installs quickly and easily without tools, giving you two more 9mm rounds in minutes.