Intruder in a Box is a replacement for ballistics gel. The Intruder in a Box brings the testing of self-defense ammunition to the next level. By introducing more variables into the test, the user has a more accurate result into the resiliency and effectiveness of their everyday carry ammo. The Intruder in A Box is composed of different materials (skin, muscle, bones and internal organs) to represent the different parts of the human torso. If you carry a handgun for personal protection, you owe it to yourself and your loved ones to know how your defensive ammo performs out of your carry gun using a realistic physical model of an intruder.