Jimbles the Mediocre |
Pathfinder Starfinder Roleplaying Game Subscriber
There isn't a penalty for multi-weapon fighting (technically), the penalty is for making a full attack:
Core Rulebook > Tactical Rules > Actions in Combat (pg. 248) wrote:
Full Attack
You can spend a full action to make two attacks, each with a –4 penalty to the attack rolls. These attacks can be made with the same weapon or different weapons.
The Multi-Weapon Fighting feat reduces that penalty from -4 to -3, provided you make the attacks with two different operative weapons OR two different small arms weapons.