 SAKO 9 D-fire mechanism as been designed to have world leading lock time under 1.3 millisecond. Lock time is the time interval between the seer release and the fire being striking the primer and igniting it. The faster the lock time is, the less time barrel has to move relative to the target, thus increasing accuracy. Second factoring point affecting accuracy of the SAKO 9 trigger unit are the trigger mechanism components. implemented with extremely tight tolerances. When components are manufactured within high tolerances, the trigger can achieve very clean and crisp trigger operation, often described like breaking glass sensation. The SACO 90 firing mechanism works hand in hand with other components, so that it is possible to achieve the best accuracy out of the whole rifle. Essentially SACO trigger of a zero creep, meaning sears do not have perceptible scrape against each other prior the release. This all is achieved with cutting edge manufacturing method. They can care both the dimensional accuracy of the parts and high surface quality of the sear parts. Sako 90 trigger mechanism offer user to choose from five different weight of pull setting without disassembling the rifle. By having a possibility to change quickly between clearly marked weight of pull settings it is easier to adopt the rifle to each discipline. This also provides a consistent way to learn to pull the trigger to achieve maximum accuracy. Trigger plate position can also be adjusted for the best shooting ergonomy for any hand size.