The Pitchfork is a weapon introduced in Eternal Damnation and featured in the original AWP. It is one of the most powerful melee weapons in the game. Normal fire swings it, having more power than shovel, but not enough to instantly kill everyone. Secondary fire jabs forward, having the same amount of power as a Scythe's swing; instantly slicing through anyone. It does cut people in half and can hack limbs off with this jab.
The original variant has no swing, and the jab slices people more cleanly in 3 compared to AWP. This variant is available as a workshop mod for Postal 2 Complete packaged in with Eternal Damnation's missing weapons.
During Postal 2 Halloween event, a new pitchfork is available for use which is basically a reskinned shovel, and has about the same power.