Like the title says, whats the difference if any... Price? I would rather build a VX-3 from the custom shop at leupold with the turrets and reticle that i want and still be under the cost of the Mark 4. Does anyone else notice how there is a lot of items out there that when titled or described as "Tactical" the price tends to be much much higher. Sounds like a selling gimmick to me. Kinda like when i buy boat parts that have the word "marine" in the title; no difference except for an extra $100.