### Question
What is the definition of firearm?


### Answer
The definition of **firearm** is as follows in *40 U.S.C. § 5104*:

> given that term in section 921(3) [1](#5104_1_target) of title 18.

#### Citation:
  - *40 U.S.C. § 5104*
  - Heading: **SUBTITLE II-PUBLIC BUILDINGS AND WORKS > PART B-UNITED STATES CAPITOL > CHAPTER 51-UNITED STATES CAPITOL BUILDINGS AND GROUNDS**

