PRESCOTT, Ariz. -- Authorities seized a mortar launching tube and $29,000 worth of firearms last week from a gun store, the owner of which was a prohibited firearms possessor, the Yavapai County Sheriff’s Office said.

The store's owner, 55-year-old Terry Lee Windust, of Rimrock, was arrested March 5 on drug and weapons charges. Deputies said Windust had 19 grams of methamphetamine and a concealed firearm in his vehicle.

Authorities searched Windust's home and said his roommate, 54-year-old Blair Cox, had methamphetamine and drug paraphernalia.

Deputies said they removed 18 firearms and "paraphernalia related to drug sales" from the home.

On March 20, deputies served a follow-up warrant at Windust's Cornville store, Number One Guns, where they seized 38 firearms worth an estimated $29,000, a 37mm mortar launching tube and a military night vision scope with the serial number removed.

Windust and Cox both face various drug and weapons charges.

Authorities said they are investigating the true ownership of the firearms seized during the searches.

Detectives are also reviewing the firearms license for Windust's store.

SLIDESHOW: Cow Unexpectedly Lands In Car Seat

SLIDESHOW: Baby Thrown From Burning Building

SLIDESHOW: Look Who Started As Cheerleaders Back When

SLIDESHOW: New Celebrity Parents In Past Year

SLIDESHOW: Reader-Submitted Tattoo Photos

SLIDESHOW: Red-Hot Redheaded Celebrity Women

SLIDESHOW: EW's Smartest People In Hollywood

ELSEWHERE ON KPHO.COM: Gilbert police are looking for motorists pulled over by a 70-year-old suspected police impersonator. CLICK HERE for details.

MORE SLIDESHOWS: From the bizarre to the tragic to late-breaking news, visit the KPHO.com slideshow section and click away! CLICK HERE for images.