text:  a video game manufacturer and a gun manufacturer go out to this desert outside of Las Vegas to capture the sound of an AR-15-style rifle being fired because they want to make sure it's accurate and realistic. And we've talked to gun owners who designed their AR-15s based on what they had used in the Call of Duty games earlier. When they were too young to own a weapon, they would then trick out their gun to sort of match what they had used in these video games.