The gun most likely being referenced is the SIG Sauer P320. Reports have said some users and agencies claim it can fire without a trigger pull, and there have been lawsuits and safety concerns around that issue.

What’s being said

  • A Houston police officer said his P320 fired on its own and sued the manufacturer.
  • Earlier reporting also described injuries involving soldiers and other users who said their P320 discharged unintentionally.
  • The core allegation is that the pistol may fire without a trigger pull in some situations, which is why it has drawn so much attention.

Important context

  • These are allegations and reported incidents, not a universal claim that every P320 does this.
  • Firearm safety and malfunction claims are serious, so it’s best to treat the topic cautiously and avoid speculation beyond what’s been reported.

tldr

Most likely, they mean the SIG Sauer P320.