A blaster is a fictional gun that appears in the Star Wars universe. Lucasfilm defines the blaster as "ranged energized particle weaponry". Many blasters mirror the appearance, functions, components, operation, and usage of real life firearms. They are also said to be able to be modified with certain add-ons and attachments, with Han Solo's blaster being said to be illegally modified to provide greater damage without increasing power consumption. The iconic E-11, a standard mid-range weapon used primarily by stormtroopers, is based on the real-life Sterling sub-machine gun used by the armed forces of the United Kingdom over the second half of the 20th century. Several design changes were made by the filmmakers, such as alterations to the magazine. Design in films In the films, the design of the E-11 blaster rifle was based on the Sterling submachine gun. The design of the modified DL-44 blaster pistol owned by Han Solo was based on the 7.63-caliber Mauser C96, an early and successful automatic pistol that was used in World War I and World War II. Lucasfilm's prop department added a scope and an emitter nozzle to the pistol. The blaster made for the 1977 film A New Hope was lost, and a second blaster was made with resin from the cast used for the first one. The blaster was subsequently used as a prop in The Empire Strikes Back and Return of the Jedi. Other heavy repeating blasters' were Lewis light machine guns with the barrel shroud and pan magazine removed. Functional Sterlings firing blank cartridges were used in some scenes with the laser bolt added later in post-production. These blank cartridges are responsible for the muzzle flash seen on screen and, in some scenes, the cartridges themselves can be seen being ejected from the guns, or the actual sound of the blank cartridge is not dubbed over by a sound effect. Ben Burtt, a sound designer who worked on the Star Wars films, came up with the sound of blaster fire during a family backpacking trip in the Pocono Mountains in 1976. Burtt hit the guy-wire of an AM radio transmitter tower with a hammer and recorded the sound with a microphone close to the impact. In a chapter of the book Myth, Media, and Culture in Star Wars, Michael Kaminski, writing about the influence of Japanese director Akira Kurosawa on the Star Wars films, said that Kurosawa's Ran