A U.S. House investigation has found that gun manufacturers have taken in more than $1 billion from selling AR-15-style guns over the past decade. More: https://www.wfaa.com/article/news/nation-world/gun-makers-made-more-than-1-billion-us-house-investigation/507-c1c9e728-2adc-4ec1-98fc-51fbfaecfd1b