What are the standard kits that become available after reaching certain ranks? AND can someone list all the ranks they become unlocked at? :) would help a lot!

I thought there were standard kits that become available for a limited time after you rank up? I'm guessing from your response the pitbull kit probably isn't one of them, huh? Boar Kit was the last one made available to me but that was 2 ranks ago...Figured I would have seen a new one at 1st lieutenant rank but nothing's changed in my garage :(

Anyone know what rank the Pitbull Kit becomes available?