17-year-old Wisconsin boy arrested for owning tools to convert gun into fully-automatic firearm

ADAMS, Wis. (WFRV) – A 17-year-old boy in Wisconsin was arrested on April 24 regarding an investigation into illegal purchases and possession of fully-automatic gun parts.

The Adams County Sheriff’s Office reported that officials performed a search warrant on April 24, 2025, in the 2400 block of State Highway 13 in Adams as part of an investigation into an allegation of illegal possession of fully-automatic firearm parts.

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The case involved controlled transfers of the parts with surveillance, and the search warrant unveiled tools that are used to make semi-automatic guns become fully-automatic. Some of the items found were:

  • 3D-printed handguns without serial numbers
  • 3D-printed stripped lower receiver for an AR-15
  • Hundreds of 3D printed drop-in auto sears
  • 3D-printed Glock switches
  • Fully assembled and modified Glock
  • Gunsmithing items
  • Gun parts
  • THC Paraphernalia
  • 3D Printer
  • Ammunition and magazines

The evidence is still being processed; however, 17-year-old Ayden Seeley-Siegert of Adams was arrested and charged with the following:

  • Converting a firearm to fully-automatic
  • Selling, delivering or possessing a firearm silencer
  • 10 counts of selling, delivering or transporting machine guns

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The investigation is ongoing, and more charges may be referred to the Adams County District Attorney’s Office pending further details. Seeley-Siegert’s cash bond was set at $2,000 in a hearing on April 25.

No additional details are available.