| Mashing Pumpkins | Ludlam Island Brewery | Fruit and Field Beer | 4.3% |
| Mashtag 2019 | BrewDog Ltd | Imperial IPA | |
| Maskrosmjöd | Håkan | | 16.0% |
| Maslifter Oktoberfest | Hops Haven Brew Haus | Märzen | |
| Mason Series #7: 20th Anniversary | Red Brick Brewing Company | American Imperial Stout | 10.0% |
| Masonry VII | Floodland Brewing | Wild Ale | 5.2% |
| Mass Action | Bottle Logic | | |
| Mass Ave | Trillium Brewing Company | | |
| Mass Extinction | Twin Leaf | American Imperial Stout | 12.7% |
| Mass Extinction Ice Barley Wine | Phillips Brewing Company | American Barleywine | 12.0% |
| Mass Fluxes | Equilibrium Brewery | Imperial IPA | 8.1% |
| Mass Riot | Prison City Brewing | American IPA | 6.3% |
| Mass Rising | Jack's Abby | Imperial Pilsner | 8.0% |
| Mass X Acceleration | Equilibrium Brewery | Imperial IPA | 8.0% |
| Massacre! | Wolverine State Brewing | European Dark Lager | 10.5% |