As the title says, GPI Pro Titan Arm w/ 4x Blue and 2x Black Canisters. This comes with 6x posts (4", 6", 8", 10", 12", 14"), low mode, tools, arm bag, Robbie Carlson rain cover, a few spare parts, t-handle, and flight case that can also fit a Pro Vest with the arm. There is a WK solid block pictured but that has already sold. I do still have the socket block from that back mount and can sell that if you want a backup or switch between front and back mount.
$17,000 obo
Add the socket block: $850