MBX 171.25mm - 9mm/.38 STI Complete Magazine
MBX 171.25mm - 9mm/.38 STI Complete Magazine.
MBX Complete Tubes were designed to be Competition Ready with exclusive features to meet the highest demands for today's shooters.
MBX 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.
MBX tube is designed to work with STI/SVI & all 2011 style pistol grips and mag catch height. Concerning the New STI grips due to the reworking on some models, MBX cannot guarantee our magazines will drop-free and the grip may need to be adjusted.