Figure 4 Deadfall The figure 4 is a trigger used to drop aweight onto a prey and crush it (Figure8-12). The type of weight used mayvary, but it should be heavy enough tokill or incapacitate the preyimmediately. Construct the figure 4using three notched sticks. Thesenotches hold the sticks together in afigure 4 pattern when under tension.Practice making this trigger before-hand; it requires close tolerances andprecise angles in its construction.

Based on U.S. Army Field Manual 21-76