Forged Clothing have a new line of hats out. I’m not a huge fan of the flat brim look myself, but the varied caps may well suit your own skirmish setup:
Hats! New hats in your favorite styles. Forged hats are finally here!
American Outlaw Black Cap
American Outlaw Red Cap
Forged Cross Gray Cap
Forged Cross White Cap
Forged Fidel Cap in Black & Gray
