The complete kit to change to the. 22 caliber for the HK4. While it is used it does not seem to have been used much and is in very good shape. I have never installed this particular kit. The item “Heckler & Koch HK4 22 Conversion Kit Original Box Set” is in sale since Sunday, May 06, 2018. This item is in the category “Sporting Goods\Hunting\Gun Parts\Pistol”. The seller is “mkvolo13″ and is located in Catoosa, Oklahoma. This item can be shipped to United States.

• Specific Part: 22 Conversion Kit
• Brand: Heckler & Koch
• Material/Finish: Steel
• Model: Heckler & Koch
• For Gun Make: Heckler & Koch
• Type: Set/Kit
• For Gun Model: HK4