ALL meanings of single-action
sin·gle-ac·tion
S s - adjective single-action (of a firearm) requiring the cocking of the hammer before firing each shot: a single-action revolver. 1
- noun single-action (of a firearm) requiring the hammer to be cocked by hand before firing 0
- adjective single-action designating a firearm whose hammer must be cocked by hand before each shot 0