I sometimes think that he is saying this to motivate the radical base of the party for the election.
If so, don't tell him he is motivating the wrong base!
Just more psyops and Beto is being the useful idiot to promote it. He keep the rhetoric cranked up to try and move the needle by a significant amount, all the while the plan is just keep it moving into he desired direction which ultimately is total confiscation.
The powers that be will then offer some lighter form of gun control: regulated magazine sizes, registrations, elimination of future sales of guns with certain features, etc. All the while pointing at Beto and asking, "Do you want our plan, or Beto's plan?" Which at some point in the future the process will be repeated.