A Republican lawmaker from Texas told Democratic presidential candidate Beto O’Rourke that his own “AR” is ready for him after O’Rourke said he would back a gun-control plan to recall assault-style rifles from Americans.

At the Democratic primary debate on Thursday night, O’Rourke said he supported a plan to confiscate weapons “designed to kill people on a battlefield.”

“Hell yes we are going to take your AR-15, your AK-47,” O’Rourke said to applause from the audience in Houston.

After the debate, Briscoe Cain, who represents a district in the Texas statehouse, tweeted at O’Rourke: “My AR is ready for you Robert Francis,” a reference to the candidate’s given first name.

Cain soon deleted the tweet, but not before O’Rourke took a screenshot of it and replied to him.

“This is a death threat, Representative,” O’Rourke wrote to Cain. “Clearly, you shouldn’t own an AR-15—and neither should anyone else.”