The Betty is a secondary weapon for the Stealth class in Blitz Brigade. It has rather identical stats to a Soldier's primary weapon, specifically the Woodpecker. It deals a decent amount of damage with a positive fire rate and an average critical chance for a Stealth's secondary weapon. The ammo capacity and the range are also average for this class.
Fun fact: If you look at the icon where the player can tap to reload or see the amount of ammo left, or look at the strip which displays who killed who, you will notice that the Betty has a stock on the back of the gun, which is not displayed in the store or in gameplay. It is based of a Beretta M12 submachine gun.