Currently, there is no known research on teaching gun safety skills to individuals with developmental disabilities. Research has shown that children typically engage in gunplay behaviors if they find a firearm. These behaviors can lead to unintentional firearm injuries and even death, especially for young children. Previous research has shown the success of video modeling for teaching various skills to individuals with autism. This study examined the effectiveness of video modeling for teaching gun safety skills to three children with autism spectrum disorder, and found that video modeling was effective for one participant, but in situ training was needed to promote maintenance. For a second participant, IST was effective for skill acquisition and maintenance. Finally, a modified IST procedure was effective for a third participant when implemented by a trainer but not when implemented by his mother.