At a campaign stop in Michigan Joe Biden made the mistake of letting himself be questioned by a group of auto workers in an uncontrolled environment.

When one of the men accused him of “actively working to diminish our Second Amendment rights,” Grandpa Simpson shot back . . .

WATCH: “You’re full of sh*t,” @JoeBiden tells a man who accused him of “actively trying to end our Second Amendment right.” “I support the Second Amendment,” Biden adds while vising under-construction auto plant in Detroit. @CBSNews pic.twitter.com/sueOSBaY9P — Bo Erickson CBS (@BoKnowsNews) March 10, 2020

Listen closely to the exchange…the audio quality isn’t great. After telling the man he’s “full of shit,” Biden also called him “a horse’s ass.” Somehow the snippy septuagenarian avoided calling him a lying dog-faced pony soldier.

The former veep then went full John Kerry Fudd, bragging about his shotguns as proof that he’s a for-realz gun owner and a staunch supporter of the right to keep and bear arms. Cranky Joe then challenged his questioner on the limits of Second Amendment rights and said he’d “take the AR-14s away.”

As if gun owners need reminding, “assault weapons” bans and ever-stricter gun control laws are bedrock agenda items for every Democrat candidate for office. The only thing surprising by any of this is that Uncle Joe thinks that, after prospectively appointing Robert Francis O’Rourke as his administration’s gun control czar, he can get away with claiming that he isn’t out to grab anyone’s guns.

Keep the popcorn popped and look for more of these challenges between now and November…assuming, that is, that Biden’s handlers continue to allow him to interact unsupervised with actual voters.

ED: This article has been updated to clarify that Biden was meeting with auto workers, not construction workers.