Yes, but state constitutions must be compliant with the federal constitution.
This is true...
“DECLARATION OF RIGHTS.
We, the People of the State of Maryland, grateful to Almighty God for our civil and religious liberty, and taking into our serious consideration the best means of establishing a good Constitution in this State for the sure foundation and more permanent security thereof, declare:
Article 1. That all Government of right originates from the People, is founded in compact only, and instituted solely for the good of the whole; and they have, at all times, the inalienable right to alter, reform or abolish their Form of Government in such manner as they may deem expedient.
Art. 2. The Constitution of the United States, and the Laws made, or which shall be made, in pursuance thereof, and all Treaties made, or which shall be made, under the authority of the United States, are, and shall be the Supreme Law of the State; and the Judges of this State, and all the People of this State, are, and shall be bound thereby; anything in the Constitution or Law of this State to the contrary notwithstanding.
Art. 3. The powers not delegated to the United States by the Constitution thereof, nor prohibited by it to the States, are reserved to the States respectively, or to the people thereof. “
A blanket statement that the rights of the citizens of this state, where silent by the Maryland Constitution, are supposedly deferred to the Federal Constitution.
When, 2A is incorporated Maryland will be forced to allow Constitutional open carry without a permit.