The Trump administration just took the position last week in the Fifth Circuit that gun mufflers are not arms and therefore are not deserving of any protection whatsoever under the Second Amendment.
A district court judge threw out criminal charges based on an unregistered silencer. The Fifth Circuit reversed. The defendant asked for a rehearing en banc. Pam Bondi filed a brief asking for a delay while the new justice department personnel decided on a position, as the President's executive order told them to do (review the cases for whether there should be a new position taken). Did the DOJ take a new position? Nope. They filed a two page brief taking the same position as the Biden administration, that a silencer is not an arm and therefore has no protection under the Second Amendment. How do you like that?
Trump has been an absolute dud on the Second Amendment.
Appellate courts have ruled in 2025 that the following are not arms and therefore not deserving of protection:
Gun mufflers (5th Cir)
SBRs (the Army rifle has a 14 inch barrel and is therefore an SBR, how can this not be a militia weapon???) (7th Cir)
Magazines that can hold more than 10 rounds (9th Cir)
In addition, the 11th Circuit just ruled that those under 21 have no Second Amendment rights whatsoever.
In all four of those cases the DOJ did not change positions from the Biden Administration position.