Holzer returned to trucks for It is Guns (2018–19), which was a response to mass shootings across the United States. In spring 2018, in support of widespread protests and student demands for increased gun control following the Parkland shooting, Holzer wrote a new text series that vividly unfolds the horrors of gun violence. Stark images such as RED BLOOD and WHITES OF EYES give way to the quiet desperation of SHIELD HIM / SHIELD HER and STAY WITH ME CHILD, contrasting darkly with the celebratory language of gun culture: GOOD AIM / GREAT AIM / BURST FIRE / TURKEY SHOOT. These texts were debuted on trucks that circulated, anonymous and unannounced, through American cities including New York, Washington, Los Angeles, Miami, Atlanta, Dallas, and Chicago. LED billboards mounted on these trucks flashed white words on black, popping in succession like free-association poetry and sometimes mimicking the rapid-fire rhythm of semiautomatic weapons.