We have lockboxes in the salleyport at the entrance door to the cellblock/processing area and also at the entrance from the report writing room to the cellblock. Policy is to secure your firearm before removing the prisoner from the car to bring them inside or or at the other one before entering the cellblock to help with processing.
There are signs posted at each door " No firearms, ammunition, OC spray, knives or batons allowed in cellblock". Most supervisors will give some leeway with OC. Guys have been written up for being forgetful about this.