Heckler & Koch HK Model HK4. 22lr barrel & recoil spring. The barrel has serial number 21204 stamped on the top which MATCHES the serial number stamped on the box 21204. 22lr magazine is date stamped 11/74.
The conversion kit is used but overall good condition, please see pictures for more details, everything that is in the pictures is what is included. The screwdriver is missing from the kit. The item "Heckler & Koch HK Model HK4.22LR Conversion Kit HK 4.22lr barrel & mag & box" is in sale since Saturday, May 8, 2021. This item is in the category "Sporting Goods\Hunting\Gun Parts\Pistol".The seller is "h-k-p-7" and is located in Virginia Beach, Virginia. This item can be shipped to United States.