5x5 Brewing Company: 40mm Stout

Official description from the brewery:
The 40 mm grenade is a military grenade caliber for grenade launchers in service with many armed forces. There are two main types in service: the 40×46mm, which is a low-velocity round used in hand-held grenade launchers; and, the high-velocity 40×53mm, used in mounted and crew-served weapons. Like a high velocity 40mm grenade, our 40MM Stout™ delivers a powerful payload of full bodied flavor. This rich, dark, chocolate espresso stout will have you from the first sip with its distinct full-bodied flavor and creamy texture. Slight hints of smooth and spicy dark fruit, coupled with coffee and caramel makes it the perfect brew to enjoy at any time.