Which of the following statements is accurate about blowback firearms?

The statement regarding blowback firearms being operable in both semi-automatic and automatic modes is accurate because of the fundamental design principles of blowback operation. Blowback firearms function by using the energy created from the firing of a cartridge to cycle the action. In semi-automatic mode, the energy from the fired cartridge is used to eject the spent casing, cycle the action, and load a new round into the chamber, allowing the shooter to fire one shot per trigger pull. In automatic mode, the firearm can continuously fire rounds as long as the trigger is held down, utilizing the same blowback principle to cycle through multiple rounds rapidly.

This design versatility is an essential feature of blowback firearms that enables them to operate effectively in both firing modes. Understanding the underlying mechanism helps in appreciating the operational capabilities of these firearms and how they meet various shooting demands.