Adding Ruger Mark II (MK II) 22LR Receiver by Tarty.
treecc2afb7a52665af5a15cf3245220edf8b905369d
drwxr-xr-x - Ammo
drwxr-xr-x - Firearms
drwxr-xr-x - Grenades
-rw-r--r-- 35119 LICENSE
drwxr-xr-x - Misc
drwxr-xr-x - Muzzle_Devices
drwxr-xr-x - Pistols
-rw-r--r-- 2644 README.md
drwxr-xr-x - Rifles