"Since the massacre in Orlando early Sunday morning, pro-gun pundits have come out in force to argue that the weapon used in the attack is not an assault rifle. The gun lobby prefers to call these weapons “modern sporting rifles,” euphemistic ammo it can fire in an ongoing semantic debate. But make no mistake: What the Orlando attacker used was a weapon of war. It was designed to kill as many people as possible, as quickly as possible. Witness this harrowing audio captured by a bystander outside the Pulse nightclub in which Omar Mateen fires 24 shots in 9 seconds. According to a federal law enforcement official, the rifle Mateen used to murder and maim more than 100 people was a Sig Sauer MCX. Mateen legally purchased the weapon, similar to an AR-15, on June 4 in Port St. Lucie, Florida, near where he lived."