The SAKO 90 trigger mechanism offers the user the choice between five different weight-of-pull settings without disassembling the rifle. The ability to change quickly between clearly marked weight-of-pull settings makes it easier to adapt the rifle to each discipline. This also provides a consistent way of learning to pull the trigger to achieve maximum accuracy. The trigger blade position can also be adjusted for the best shooting ergonomics for any hand size.

The SAKO 90 safety solution is designed so that both the trigger and the bolt handle are locked when safety is engaged, but at the same time the firing pin is also physically blocked. This ensures that the firing pin cannot move forward in the case of a malfunction igniting the primer.