Lethal Damage With A Weapon That Deals Nonlethal Damage
You can use a weapon that deals nonlethal damage to deal lethal damage instead, but you take a –4 penalty to your attack roll.
Source
Core Rulebook pg. 252
You can use a weapon that deals nonlethal damage to deal lethal damage instead, but you take a –4 penalty to your attack roll.
Source
Core Rulebook pg. 252