Examine the lands and grooves left from the barrel of a gun as well as the fine markings with this oversized plastic bullet model. An exciting visual and hands-on demonstration to illustrate the basic characteristics of a fired bullet, this model has two separate cross sections, simulating bullets discharged from different weapons. One cross section matches the main body of the bullet model, while the other does not. By rotating the cross sections, students practice comparing land and groove markings to determine which matches the model. Size: 2" dia x 3"H.