This gun in the picture is a 6mm. I have this gun myself and it is a very trustworthy gun. I hunt whitetail deer with it and dropped deer from 200 yards. I use this for all my hunting. I hunt deer and coyote with this and it doesn't destroy the fur on a coyote or the meat of a deer. This gun shoots really fast but doesn't shoot as hard as a 243 but a lot faster. I got this type of gun from my grandpa when i was just a boy.