WGASC/MBOS is SoCal's Premier Winter Guard and Marching Band Circuit
Winter Guard Association of Southern California
Marching Band Open Series
MBOS Sponsors
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| Remo | Halftime Mag |
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| Innovative Percussion |
WGASC Now! |
| WGASC Platinum Sponsors | |
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| Creative Costuming & Design | Designs by King |
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| Band Shoppe | Director's Showcase |
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| Winter Guard Tarps | |
