Timney's Drop in trigger for Sako A Actions come factory calibrated and ready to shoot right out of the box. These triggers are fully adjustable for Sear Engagement (aka Creep), Over Travel (aka Follow Through) and pull weight. The drop in design allows the entire assembly to be installed without the need for a gunsmith. Compatible Sako Actions L461L579L61 Timney Triggers Sako A Actions L461, L579, & L61 3lb Black Trigger w/Safety C