A shocking discovery even took authorities by surprise when a rocket-propelled grenade was found during a drug raid.

The Hennepin County Sheriff's Office posted the alarming discovery, saying, "We have recovered many illegal weapons over the years, but an RPG is a first!" The Sheriff's Office says that they were conducting a search warrant at a Minneapolis residence when the RPG round was found along with narcotics and other weapons.

Two adult males were arrested during the raid and authorities recovered fentanyl powder, two handguns, one that was modified with an "auto-sear", essentially making it a mini machine gun, and of course the RPG round.

Hennepin County Sheriff's Office
Hennepin County Sheriff's Office
loading...

The Minneapolis Police Department Bomb Squad and the Minnesota National Guard were brought in to help to dispose of the dangerous RPG round. After investigating the RPG, authorities determined that the explosive was a dud, "Luckily, the RPG-7 round in this case was an inert round, meaning not an active explosive, but still scary none the less," said the Sheriff's Office.

The RPG-7 is manufactured in Russia and is a portable, reusable, unguided, shoulder-launched, anti-tank rocket launcher used around the world, over 9,000,000 of the portable rocket launchers have been made since its introduction in 1967.

Hennepin County Sheriff's Office
Hennepin County Sheriff's Office
loading...

Rocket-Propelled Grenade are highly regulated, for obvious reasons, they are categorized as a destructive device and any ownership must be registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, plus extensive background checks, licensing, and state law compliance must happen before anyone can own one.

How Many in America: From Guns to Ghost Towns

Can you take a guess as to how many public schools are in the U.S.? Do you have any clue as to how many billionaires might be residing there? Read on to find out—and learn a thing or two about each of these selection’s cultural significance and legacy along the way.

Gallery Credit: RACHEL CAVANAUGH

States with the most registered hunters

Stacker analyzed data from the U.S. Fish and Wildlife Service to determine which states have the most registered hunters. Read on to see how your state ranks on Stacker’s list.

Gallery Credit: Meagan Drillinger

More From B105