https://armedassault.fandom.com/wiki/Granit_(uniform)#:~:text=Wearable uniforms in ArmA 3 , (Parenthesis) denote variants. Karts DLC ...
Just for proof that Granite B's are the same armor rating as CSAT'S and pilot covs.
ok so I just tested it and its a 1 tap to the chest with no vest at ANY DISTANCE!
Granite B's with a lvl 1 vest added it takes the normal 2 shots up to at least 80m but probably more.
Granite B's with a lvl 3 vest it takes 3 shots up to 80m but probably more. BUT THIS PROVES IT ARMOR STACKS AND TAKES 3 BULLETS.
keep in mind I ran these tests with a MK1.