I found this like new Mad Dog ATAK at a yard sale. It was in a pasteboard shipping box addressed to the US Secret Service Training Center in MD with a ship date of 1995 on it. Other than a series number etched on the sheath/knife there were no other markings. I had no clue what it was but it looked top-notch.
After a exhaustive search to figure out what it was (I'm not a high-end custom knife person) I finally found out and was given the contact info for the maker, a Mr. Kevin McClung who is the owner/maker of Black Dog knives. I was told he had a contract to supply such knives to the US Navy Seals back in the 90s.
I EMed him and he replied back saying he had made that series for the USSS, DSS, and the Columbian Government.
Lord knows I could never afford to pay the collector's price for such a knife so it was nice to add it to my collection.