LEGO Dark Stone Gray Shield 2 x 4 Warrior (61821)

LEGO Dark Stone Gray Shield 2 x 4 Warrior has been used in at least 8 LEGO sets over the past 17 years, since it was first used in 2007. You can also find this part in at least 2 other colors. It has a design ID of 61821 which can usually be found molded into the bottom of the part.