The shooting happened Saturday at about 10:30 p.m. outside a house in the 300 Block of West Prospect Street in Seattle's Queen Anne neighborhood.
Police showed up at the house after receiving 911 calls about shots fired in the area.
When they arrived, the man was still outside a house with his weapon in sight and rifle-trained officers took positions. The man went inside the home, but came back outside moments later and opened fire. Officers fired back, wounding the man.
According to police, the wounded man crawled back inside. A SWAT team robot entered the home later on and found the man dead.
Police say they found weapons staged near the front door, including semi-automatic rifles, shotguns, and body armor.
"We have been out here in the past, and there have been reports filed at this location in the past," Patrick Michaud with Seattle Police Department said on Saturday.
On Friday, officers responded to a call about a disturbance at the man's West Prospect Street home. They spoke with him but made no arrests.
Later that night, they got another call that the still-unnamed suspect had just sent threatening text messages to members of his family. Officers returned to the home to arrest the man, but he wasn't there.
The investigation is ongoing.