Gray Brodie Helmet

All brodie helmets:

https://www.roblox.com/catalog?Keyword=brodie&Category=1&CreatorName=Iskender%27s%20Excellent%20Emporium&CreatorType=Group&salesTypeFilter=1

More items here: https://www.roblox.com/catalog?Category=1&CreatorName=Iskender%27s%20Excellent%20Emporium&CreatorType=Group

Also known as the Mark I, M1917 Helmet, Tommy Helmet, or Doughboy Helmet. Lot of names for these, but they saw a lot of use by a lot of different people, so that's probably why. In both World War 1 and World War 2, too.