Alabama Code Title 13A. Criminal Code § 13A-11-55

In an indictment for carrying weapons unlawfully, it is sufficient to charge that the defendant carried concealed about his person a pistol, or other description of firearms, on premises not his own, or a bowie knife, or other knife or instrument of the like kind or description, or other forbidden weapon, describing it, as the case may be;  and the excuse, if any, must be proved by the defendant on the trial, to the satisfaction of the jury;  and if the evidence offered to excuse the charge raises a reasonable doubt of the defendant's guilt, the jury must acquit him.