The purpose isn't groundhogs, it's so the people can throw off a Stalin, if we ever had one. Or a Trump, for that matter, if he were to do all that he's been accused of.
FWIW, "assault rifles" are not widely available in the U.S. -- that is a systematic Big Lie, promoted by people opposed to the 2nd Amendment.
The amendment says the People have the right to keep and bear arms. So, it's hard to see how vendors supplying that demand are "misusing" the second Amendment.
Firearms aren't necessarily a partisan issue; Americans of all political parties own them. Swiss, too.
I hope your border guards confiscate pocket knives, pencils, gasoline, and skateboards too--those can be dangerous!
Cheers, James Arthur