Mexican artist Pedro Reyes is no newcomer to transforming weapons of destruction into instruments of construction. In 2008, he led a project called Palas por Pistolas to remake 1527 confiscated weapons into an equal number of shovels that were then used to plant the same number of trees. Earlier this year, the Mexican government contacted him to offer 6700 additional confiscated revolvers, shotguns, machine guns, and other weapons, cut into parts and essentially destroyed, for another project. What he came up with is Imagine, a set of 50 musical instruments crafted by six musicians working for two weeks straight. A few examples are shown below, along with a video of the instruments in action. Many more images are available on his site and over on Designboom.