A man who wore body armor and carried a loaded weapon into a Walmart in Missouri over the summer to test the Second Amendment pleaded guilty Friday to making a false report.

Dmitriy Andreychenko, 21, pleaded guilty to the misdemeanor charge after originally being charged with making a terrorist threat.

Under an agreement with prosecutors, he received a 180-day suspended sentence and two years' probation. He also must receive firearm training, Greene County Prosecuting Attorney Dan Patterson said in a news release. The terrorist threat charge carried a sentence of up to four years in prison.

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The Springfield resident caused panic inside the big-box store on Aug. 8 when he filmed himself entering while armored and armed. A store manager pulled a fire alarm, causing shoppers to flee.

The incident came days after a gunman killed 22 people inside a Walmart in El Paso, Texas, and another killed nine people hours later in Dayton, Ohio.

"I wanted to know if Walmart honored the Second Amendment," Andreychenko said, according to a probable cause statement.

Patterson said Andreychenko was conducting a "social experiment" and didn't intend to shoot anyone.

He said Andreychenko researched both shootings. The day before, he posted a photograph to Snapchat of a family member wearing his body armor looking down the sights of a rifle with the caption, "Watch out Walmart," Patterson said.

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Andreychenko told local media outlets his actions were "foolish" but that he didn't regret it. His attorney, Dee Wampler, admitted his client's actions were ill-timed.

The Associated Press contributed to this report.