When you mention a “bar-in-wood” shotgun, you’re referring to a particular style of shotgun design where the action body (the metal frame/receiver) is enclosed within the wooden stock, rather than sitting fully exposed as in more modern guns. This was most common in 19th-century British and Continental sporting guns. In a bar-in-wood gun, this bar is covered with wood so the stock and action appear more seamless. Only the hammers, triggers, and fences are exposed.
The Mechanics of a Wood Shotgun Bar
A wood shotgun bar is a long, cylindrical metal tube that houses the barrel and other essential parts of a shotgun. It serves as a guide for the shotgun shell to travel through during firing, directing the shot towards the target. The wood material used for the bar provides stability and support for the barrel, helping to absorb recoil and maintain accuracy.

 
