Somebody with the DOJ filed a brief that suppressors aren't firearms and aren't protected by the Second amendment. JoshS replied in another thread that this may have been an individual position of a legacy employee that may not reflect the current admin's view. Apparently the case is on some sort of hold right now. Remains to be seen what current admin's actual position is and whether govt workforce reduction will change anything with ATF.
I certified my last, in the foreseeable future, e-form 4 on Saturday. We'll see how long it takes.