The GSG-5PK is an identical replication of the MP5PK, except one great thing: It's a .22 caliber. Because of the low cost of ammunition the GSG-5 makes a perfect plinking pistol, or training pistol. Nothing of its kind has ever been introduced in the United States. The user will be impressed with its weight and performance. GSG-5PK has to offer with its railing system, faux supressor and easy change magazine. For training purposes, the GSG-5 is a low-cost alternative for Law Enforcement agencies and departments that use MP5s in the field.