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MBX Extreme - STI 9mm/.38 170mm Complete Magazines
MBX Complete Tubes were designed to be competition ready with exclusive features to meet the highest demands for today's shooters. *Our tubes are designed exclusively to work with MBX Base Pads, Springs, and Followers. These tubes are not designed to work with other manufacturers' components. Witness holes on rear of tube to indicate round count for all tubes. Tube is designed to work with STI style grips and mag catch height. Gunsmith file fit undersized mag catch tube available for custom fitting or custom grips.