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Firearm Silencer (or Muffler)

A device designed to reduce the sound of a gun when it is fired.

National Firearms Act (NFA)

A 1934 federal law that imposes strict regulations, including taxes and registration requirements, on certain types of firearms and accessories like machine guns, short-barreled rifles, and silencers.

Internal Revenue Code (IRC)

The body of federal laws that govern taxes in the United States. Many firearm regulations, particularly those related to the NFA, are included within the IRC because they involve taxes.

Federal Excise Tax

A tax levied on the manufacture, sale, or use of certain goods and services. Unlike a general sales tax, an excise tax is often applied to specific items, like tobacco, alcohol, or, in this bill, silencers.

Preemption

The legal principle that a higher level of government (like the federal government) has the authority to overrule or nullify laws enacted by a lower level of government (like a state or local government).

Chapter 44 of Title 18, United States Code

A section of federal law that generally covers firearms, including rules for licensed dealers, prohibited persons, and the sale and transfer of common firearms, separate from the more restrictive NFA.