The Next Generation of High Performance Competition Ready Magazines for STI/SVI & all 2011 Pistols:

Made from Heat Treated 410 Stainless for Ultimate Durability.


No spacer required for 9mm/.38 magazines.

MBX Complete Tubes were designed to be Competition Ready with exclusive features to meet the highest demands for today's shooters.

- 126mm 9mm/.38 magazines hold 20-21 rounds.
- 126mm .40/10mm magazines hold 18-19 rounds.
- 141.25mm 9mm/.38 magazines hold 23-24 rounds.
- 141.25mm .40 Cal/10mm magazines hold 20-21 rounds.
- 155mm 9mm/.38 magazines hold 27 rounds.
- 171.25mm 9mm/.38 magazines hold 29-30 rounds.
- 171.25mm .40 Cal/10mm magazines hold 26 rounds.

*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.

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.



Please do not attempt to purchase large capacity magazines if you reside in a location where you may not legally posses them (California, Hawaii, Massachusetts, New York) please check laws for your state. Click Here for more information