This invention provides a locking system for a weapon that resists prying by a flat-headed tool. The system includes a base having a base channel for receiving an elongated portion of a weapon. A gate is hingedly attached to the lid by a hinge assembly. The gate moves between an open position and a closed position. The gate includes a gate channel that overlies the base channel in the closed position. A lock assembly selectively secures the gate with respect to the base in the closed position. A novel front joint, opposite the hinge assembly, is provided. It includes an internal lap joint with an overlap structure on each of a base front joint edge and a gate front joint edge. The base front joint edge and the gate front joint edge can each define a confronting, approximately horizontal surface forward of the internal lap joint.