The right to bear arms is suspended when a custodial arrest is made (for obvious reasons!). Other rights are not - 1st, 4th (to a certain extent), 5th and 6th for sure...blah blah blah
This makes no sense. One cannot be deprived of rights without due process. The Fourth Amendment deals with unreasonable searches and seizures and there is an enormous body of court law dealing with what constitutes that.
The Miranda Act is used prior to custodial interviews and interrogations so that any admissions or confessions by the person being interrogated are admissable in court.
There is no "Miranda Act." An act is an action of the legislature. The Miranda Rights Rule is the result of a Supreme Court decision in that case, Miranda v Arizona.
I will say once again, there is a reason cops are not lawyers.