This is a rare find! I paid big bucks for this, so I must pass it along. There aren't very many for sale, on the net. CG has a painted one (yuk!) for over $500, but who the hell wants to deal with removing paint from an Aluminum buckle? And mine is Stone Mint! You can NOT upgrade this buckle! It was made by Dicke, the only maker of this buckle. If you see another RZM than M4/22 it is a fake! I have circled the RZM number. CLICK THE IMAGES TO SEE THEM BETTER.