WASHINGTON — Gun-makers have taken in more than $1 billion from selling AR-15-style guns over the past decade, at times marketing them as a way for young men to prove their masculinity, even as the number of mass shootings increases, according to a House investigation unveiled Wednesday.
The weapons have been used in massacres that have horrified the nation, including one that left 10 people dead at a grocery store in Buffalo and another where 19 children and two teachers were shot to death in Uvalde, Texas.
