Install a .22 LR Barrel on a HK51 machine gun
How to install a .22 LR Barrel on a HK51 machine gun This weapons video will show you how to install a .22 LR Barrel on a HK51 machine gun. This HK 51 is not made by Heckler & Koch, but by American Class II manufacturers. This video is solely intended to show how to install the 22 LR Barrel Kit! This weapon is a .308 caliber, but with a nice Twist... a .22 LR Barrel and bolt. The Germans are amazingly bright people, aren't they. See how to disassemble and then reassemble the automatic firearm.