Rubberband Gun

grabcad

This semiautomatic rubberband launcher can shoot up to six bands, though optimal performance is achieved with four. For a smoother operation, ensure all surfaces are polished; ABS plastic can be treated with acetone while PLA requires chloroform (handle vapors cautiously). Allow parts to dry completely before assembling, and download the STL files for 3D printing, designed specifically for RepRap prototyping.