A "rolling-block" is a type of firearm mechanism commonly used in rifles and pistols during the 19th century. It features a block that rolls into position to lock the breech, allowing the weapon to fire. This design improves the strength and reliability of the firearm, making it popular among military and civilian users. The rolling-block mechanism was notably used in the Remington Rolling Block, which became famous for its simplicity and effectiveness. These firearms were widely adopted in various conflicts and are still appreciated by collectors and enthusiasts today for their historical significance and craftsmanship.