One British Sten 20rd Magazine. These WWII-era 9mm magazines were limited to 20rd by placing four brass rods into the magazine body, making it single stack. They can easily be converted back to 32rd magazines in a matter of minutes by removing these wires. These magazines are considered shooter grade. May have dents dings, light surface rust, etc. However, there is nothing about these mags that would keep them from functioning correctly.