STEADY FIRE MODE can ONLY be setup in MOD Central:
STATIC (DEFAULT) is the regular setting for the Steady Fire MOD. WHILE HOLDING FIRE, you will have a static, steadier fire rate.
DYNAMIC is ONLY compatible if your FIRE is L2 / LT or R2 / RT. The higher the pressure on the FIRE TRIGGER, the faster your weapon rapidly fires, allowing for improved ranged accuracy with less pressure.