| mulligan | De Garde Brewing | | |
| Mullin Brown | Upper Mississippi Brewing | American Brown Ale | 4.8% |
| Mullineaux | 2nd Shift Brewery | Saison | 6.0% |
| Multi-Gigantic | Rusty Rail Brewing Company | American IPA | 9.5% |
| Multichorus | Hudson Valley Brewery | | |
| Multifarious | Jester King Craft Brewery | Oatmeal Stout | 6.6% |
| Multiflora | Decadent Ales | Imperial IPA | 9.6% |
| Multiple Ectogasms | Drekker Brewing Co. | American IPA | 7.0% |
| Multiple Infinities Mexican Chocolate Stout | Artisanal Brew Works | | 9.0% |
| Multiplicity | Little Beast Brewing | Flanders Oud Bruin | 7.5% |
| Multitrack | Brewdog Ltd / Bearded Iris | Imperial IPA | |
| Multiverse Bourbon Barrel Aged | Kent Falls Brewing Company | American Imperial Stout | 9.7% |
| Mumbai Rye | Good People Brewing Co | Rye Beer | 6.6% |
| Munch Blaster 420 | Invasive Species Brewing | American Imperial Stout | 11.0% |
| Münchner Hell / Premium Lager | Spaten-Franziskaner-Bräu | American Lager | 5.2% |