WASHINGTON (AP) — Gun manufacturers have made more than $1 billion from selling AR-15-style guns over the past decade, and for two companies those revenues have tripled over the past three years, according to a House investigation unveiled Wednesday.

Those profits have come as the weapons have been used in mass shootings that have horrified the nation, including one that left 10 people dead at a grocery store in Buffalo and another where 19 children were shot to death in Uvalde, Texas.

Those guns are often marketed to young men as a way to prove their masculinity, the Committee on Oversight an...