What type of gun cannot be entered into the NCIC?

The correct choice identifies that a BB gun cannot be entered into the NCIC database. This is due to the fact that the NCIC is intended to track firearms that are regulated and defined by law, such as handguns, rifles, and shotguns which are designed to fire live ammunition. BB guns, on the other hand, are considered air guns and do not use traditional ammunition. They are typically classified differently under firearms regulations and therefore do not fall under the types of firearms that the NCIC tracks.

Understanding this distinction is crucial for law enforcement and those involved in firearms regulation, as it impacts how information is cataloged and shared among agencies. Regulators focus on weapons that possess greater potential to cause harm, which is why traditional firearms are documented while BB guns are excluded from such listings.