American Freizeit Shop is a store in Munich that sells U.S. military wares.
Amongst other things you can buy pepper spray here.
http://www.american-freizeitshop.com/
Leopoldstr. 17
80802 Munich Schwabing
Tel: 089-336162
Open: MO. - Fr. 11:00 bis 19:00, Sa. 10:30 bis 16:00