The attack on the Cincy FBI office was with a Roybi nail gun the guy thought would breach the safety glass.

An alarm went off and FBI special agents responded when the man fired a nail gun at law enforcement personnel, sources tell NBC News. The man then held up an AR-15-style rifle before fleeing in a vehicle north onto I-71 leading Ohio State Highway Patrol on a pursuit.
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WLWT.comThe guy was a J6 insurrectionist as well, that was never caught.