Supreme Court reviewing arguments regarding legality of bump stocks

The video discusses the legal status and controversy surrounding bump stocks, devices that convert semi-automatic firearms into rapid-fire weapons. Initially, the ATF did not classify bump stocks as machine guns, but following the 2017 Las Vegas shooting, the Trump administration prompted a reclassification, leading to legal challenges. Gun store owner Michael Cargill sued, arguing that such changes should be made by Congress, not the ATF. Gun control advocates argue that bump stocks make guns fully automatic, and a ruling on the matter is expected soon.

What do gun control advocates argue about the functionality of bump stocks?

What is the expected outcome regarding the ruling on bump stocks?