US President Joe Biden is to target homemade “ghost guns” as part of a new set of measures to tackle gun violence, a White House official has said.
Ghost guns have no serial numbers, making them difficult to trace. They can be bought by minors and people who would not pass background checks.
Mr Biden will enact the measures through an executive order, meaning he will not need approval from Congress.
The move comes after high-profile mass shootings last month.
A total of 18 people died in two mass shootings, one in Boulder, Colorado and the other in Atlanta Georgia.
The executive order will include measures on the use of stabilising braces and community violence prevention.
However, the president will have an uphill task. The right to bear arms is protected by the Second Amendment to the US Constitution and many people see gun control laws as infringing on their constitutional right.
What are the proposed measures?
The Justice Department will also be asked to draft a “red flag law” which states can then use to create their own legislation. These laws authorise the courts and law enforcement to remove guns from people thought to be a risk to the community.
However, because of Senate rules, in practice 60 votes are needed to pass legislation, so some Republican support is required. Republicans have blocked significant gun control laws in the past.