The headshot damage from .22 bullets to //infected// needs to be increased a little more. Regardless of distance or how cleanly you hit them (eye, temple, forehead, nothing matters) it takes a minimum of two headshots to kill an infected, which I dearly hope is not intended. The .22 is so weak that landing a headshot is absolutely crucial - landing two on a running zombie is extremely difficult, making the MkII practically useless since the suppressor effect has also been removed. I have no problem with infected tanking a full clip body shots, but landing a headshot should be rewarded to make the pistol worth picking up.