The VST (Vickers / Schoening / Tactical) Series was a Randall Made knife collaboration between Larry Vickers of Vickers Tactical and Rob Schoening of LHGK. The sole purpose of the VST Series was to provide a subdued Randall Made knife for the "guys on the ground".
A brief overview; all of the knives in the Series were completed at Randall Made knives, then customized by Rob at LHGK. Knives in the Series included an etched VST serial number, bead blasted and / or parkerized finish, and a custom VST marked, no hone pouch sheath with rivets and a drain hole. There were less than 300 knives in the Series and production dates ranged from 2011 - 2014.
Below are several links where you can read more about the Series.
VST Series knives @ Vickers Tactical.
VST Series knives @ Soldier Systems Daily.
VST Series knives @ Knifetalk Forums.