|Publisher's Choice Quality Stock Art|
©Rick Hershey/Fat Goblin Games
The say it's third arm is the result of it eating its sibling in the womb and I wouldn't be all that surprised. Thing is, that arm seems to have a mind of it's own. It senses things. I've seen a Three Armed Squat lose it's eyes and that third arm shoot a pocket pistol 50 feet as well as if it had been point blank.
They understand tech. Not like you or I, but enough to pull a trigger. Cunning, like I said.
Three Armed Squat
Armor Class: 6 
Hit Dice: 4
Attacks: Fist x2 (1d6) plus Fist x1 (1d6-2) or ranged weapon
Special: A Three Armed Squat's third arm can act independently of the Squat itself. Weak in melee, it can fire a one handed ranged weapon or thrown weapon with a + 2 modifier to it's hit roll.
Move: 6 (Charging is based off a move of 12)
Three Armed Squats stand about 4 feet tall and nearly as wide. While of relatively low intelligence, they are cunning and their third (and smaller) arm, while physically weak has an almost instinctual knowledge of missile and thrown weapons of all types. The third arm "sees" independently from the Squat and often seems to act of it own volition.
Fat Goblin Games Stock Art at RPGNow