(Sorry, no guns involved). Students spread out their SM cards in front of them. Teacher gives a clue and when they find the corresponding card, they raise it in the air. First one in air gets the points.
Variation. Have one set of cards spread out for every two players. They stand on opposite sides of the table and the first one from each pair to locate and hold up the correct card gets to keep the card. The one with the most cards at the end wins.