Crown-wearing worshippers of World Peace and Unification Sanctuary in Pennsylvania, United States scared the hell out of people and a school on Wednesday, when they arrived the church, each clutching an AR-15 rifle.

Brides were clad in white and grooms in dark suits, all arriving with dozens of AR-15s, though unloaded.

Inside the church, they drank holy wine and exchanged or renewed wedding vows in what was called a commitment ceremony, which also doubled as an advertisement for the Second Amendment.

Though the state police kept watch as the ceremony unfolded, neighbours were not at ease.

A smattering of protesters stood outside the church and a nearby school cancelled classes, the AP reported.