Interchangeable magazine posts make the sentinel plate ideal for any of your magazine fed firearms. The SP-1 will support many of your magazine fed pistols. One side of the Sentinel plate has a convenient pocket for holding parts, magazines, or cleaning supplies. The reverse side is flat for display or storage. The Sentinel Plate is designed to assist everyone from the professional armorer to the recreational shooter with their firearms.Notes: This product requires a magazine post specific to your firearm. Magazine posts sold separately.