The pistol is always the starter weapon. It does slight damage, but useful since it has infinite ammo. It causes 25 damage when fully upgraded.(out of 100 health for you and zombies).In Boxhead The Nightmare it had 100 ammo unlike in any other boxhead series
It fired crookedly and was harder to aim with (But was changed for 2Play ). It is the least damaging weapon, unless upgraded, doing two-hit kills to zombies. The pistol is useful as a last stand weapon, if all your options are exhausted and you find that there are many zombies coming in on your position.