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MBX Extreme Competition Ready Magazines - STI

The Next Generation of 2011 Style High Performance Competition Ready Magazines:

Made from Heat Treated 410 Stainless for Ultimate Durability.
No spacer required for 171.25mm & 141.25mm 9mm/.38 magazines.

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

- All 141.25mm .40 Cal/10mm magazines hold 20-21 rounds.
- All 141.25mm 9mm/.38 magazines hold 24 rounds.
- All 171.25mm 9mm/.38 magazines hold 29-30 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.

The tube is designed to work with the New MBX Extreme Follower. This is a wider follower with new features that will allow for maximum reliability and capacity.

New design features allow for wider follower to prevent cartridge from locking over or getting stuck under follower.

The tube cartridge channel is formed down the entire length of the tube to allow for maximum reliability and capacity.

Witness holes on rear of tube to indicate round count for all tubes.

*Please note that all MBX Magazines are designed to work with 2011 style grips and mag catch height.

***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.


MBX 141.25mm Magazine .40/10mm - STI-Blue Base Pad
Product ID: MBX40140BLU

Out of Stock

MBX 141.25mm Magazine .40/10mm - STI-Gray Base Pad
Product ID: MBX40140GRY
$130.00
MBX 141.25mm Magazine .40/10mm - STI-Red Base Pad
Product ID: MBX40140RED
$130.00
MBX 141.25mm Magazine .40/10mm-STI-Black Base Pad
Product ID: MBX40140BLK
$130.00
MBX 141.25mm Magazine 9mm/.38 - STI - Red Base Pad
Product ID: MBX38140RED
$130.00
MBX 141.25mm Magazine 9mm/.38 - STI-Black Base Pad
Product ID: MBX38140BLK
$130.00
MBX 141.25mm Magazine 9mm/.38 - STI-Blue Base Pad
Product ID: MBX38140BLU
$130.00
MBX 141.25mm Magazine 9mm/.38 - STI-Gray Base Pad
Product ID: MBX38140GRY

Out of Stock

MBX 171.25mm Magazine 9mm/.38 - STI - Red Base Pad
Product ID: MBX38170RED

Out of Stock

MBX 171.25mm Magazine 9mm/.38 - STI-Black Base Pad
Product ID: MBX38170BLK

Out of Stock

MBX 171.25mm Magazine 9mm/.38 - STI-Blue Base Pad
Product ID: MBX38170BLU

Out of Stock

MBX 171.25mm Magazine 9mm/.38 - STI-Gray Base Pad
Product ID: MBX38170GRY

Out of Stock


Foreign Sales:
• This item cannot be sold out of the United States without an approved import and export permit or license.

• Some parts may be restricted items and cannot be shipped overseas if the amount exceeds $500.00 without an approved import and export permit or license.