Bought a pair of 511 boots today. They gave me an ankle knife with the boots. I told them I'm in EMS and they said "Then it's good that you have an ankle knife!". My buddy who works for the same agency just laughed and walked away. I guess I'm getting free socks with these boots too...? Anyways, got the ATAC 8 side zip. Fit amazingly and are just too damn comfortable!