Originally Posted By: Lieste
Okay... but the video clearly had the 9S18 still associated with Buk M1, with 9S18M1 being part of the Buk M2 upgrade...?

No. 9S18 is a part of Buk, 9S18M1 is a part of Buk-M1, and 9S18M1-3 is a part of Buk-M2. The latter is visually similar to 9S18M1.