Guns were inspected to make sure they didn't hold bullets, with zip ties added to stop them firing.
Students from a school near the church were moved for the day while the event took place, and protests were held outside.
The church is a small group that splintered away from the "Unification Church", founded by the late self-proclaimed messiah Rev Sun Myung-moon.
The church believes:
- the gun is the "rod of iron" cited in the Book of Revelation
- the Florida shooting could have been avoided had teachers been armed