Modifying a firearm to fire continuously with a single trigger pull involves a complex legal process governed by the National Firearms Act of 1934 and subsequent legislation. This modification significantly alters the weapon’s function and requires strict adherence to federal regulations, including registration, background checks, and specific permits. For example, a semi-automatic rifle, firing one bullet per trigger pull, can be modified to fire automatically, but only after meeting stringent legal requirements.
The main rationale behind these regulations is public safety and crime control. Unrestricted access to automatic weapons is considered a significant threat due to their potential for widespread harm. The historical context underscores this concern, with the NFA arising during a period of heightened gangster activity and the perceived need to regulate particularly dangerous firearms. Understanding the legal framework surrounding these modifications is crucial for responsible gun ownership and adherence to the law.