Falling Block action --- Upper photo, action closed. With the addition of the NoGravity tag, a falling block can float in the air, leaving the player the thought that a solid block is there, but in fact that block can be passed through.

Amongst single shot aficionados it is generally accepted as the pinnacle of English single shot rifle- maker’s art.

The Hallowell & Co.

This can be used for custom maps to hide stuff or to create secret ways. Create ghost blocks. In 1872 John Farquharson patented a falling block single shot rifle action that, from its inception, became a classic firearms icon.
A single shot falling block rifle design that points naturally, has mild recoil characteristics, and is easy to carry and shoot well. Built to order in ready-made and wildcat chamberings suitable for hunting all game. A rolling block action is a form of firearm action where the sealing of the breech is done with a specially shaped breechblock able to rotate on a pin. Building the first run of sidelever falling block actions, I've documented the process so far. The Farquharson is renowned for its graceful form combined with balance and strength.

Illustrated Firearms Dictionary is for informational purposes only. Very nice, but I would wonder if that cylinderical block might transfer the force of recoil into the sidewalls of the action causing it to shoot loose or fail rather quickly. Lower photo, action open. The breechblock is shaped like a section of a circle. Falling Block (25) Lever Action (485) Over/Under (201) Pump Action (15) Revolver (15) Rolling Block (6) Semi Automatic (1923) Side by Side (28) Sidelock (8) Single Action (29) Single Shot (34) Single/Double Action (1) Trapdoor (1) Barrel Length. The first step obviously is to extract the action from the plate of 8620 steel in which it is contained.
The breechblock is locked into place by the hammer, thus preventing the cartridge from moving backwards at the moment of firing. In this case, a Webley Model 1902; the rifle chambered for .577, 3" Nitro Express. 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.