M1027 Up-Armored HMMWV (UAH). I was told this was the predecessor to the M1114/M1151. Here are some additional comments regarding the M1027 from Hans: "The designation M1027 is indeed a little mystery. All my sources tell that the first UAH was named M1109. I attach a pic of the vehicles sign as seen on the Armed Forces Day show back in 1998 at the 1st ID barracks in Wuerzburg, Germany."