Falling-block action
Single-shot firearm action / From Wikipedia, the free encyclopedia
A falling-block action (also known as a sliding-block or dropping-block action) is a single-shot firearm action in which a solid metal breechblock slides vertically in grooves cut into the breech of the weapon and is actuated by a lever.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Ruger_no1_243_right_open.jpg/640px-Ruger_no1_243_right_open.jpg)
See also: Firearm action § Dropping block