While many in the US have one or more gun, I would argue most were unaware of bump stocks until the 2017 Las Vegas Shooting. TL;DR, a bump stock uses the recoil of the rifle as a “spring” to help pull the trigger over and over again - effectively behaving like a “machine gun.” As already stated, it does not meet the US legal definition of a machine gun because you’re still firing one round per trigger pull. The bump stock basically makes the trigger pull automatic.
As for why it’s a big debate, read the wiki article. One guy killed A LOT of people pretty quickly using this device to greatly increase his rate of fire. It was a public eye opener for much of the country. So much so, that even Donald f’ing Trump came to the realization that something should be don. He didn’t even really get much push back on it from the right or the NRA. That’s how sobering the massacre was. That said, it happened long enough ago that it’s memory probably isn’t powerful enough for anyone to change the law to ban them and similar mechanisms (see: the binary trigger elsewhere in the comments). If they tried banning them today, the NRA and conservatives would fight it tooth and nail.
While many in the US have one or more gun, I would argue most were unaware of bump stocks until the 2017 Las Vegas Shooting. TL;DR, a bump stock uses the recoil of the rifle as a “spring” to help pull the trigger over and over again - effectively behaving like a “machine gun.” As already stated, it does not meet the US legal definition of a machine gun because you’re still firing one round per trigger pull. The bump stock basically makes the trigger pull automatic.
As for why it’s a big debate, read the wiki article. One guy killed A LOT of people pretty quickly using this device to greatly increase his rate of fire. It was a public eye opener for much of the country. So much so, that even Donald f’ing Trump came to the realization that something should be don. He didn’t even really get much push back on it from the right or the NRA. That’s how sobering the massacre was. That said, it happened long enough ago that it’s memory probably isn’t powerful enough for anyone to change the law to ban them and similar mechanisms (see: the binary trigger elsewhere in the comments). If they tried banning them today, the NRA and conservatives would fight it tooth and nail.