 Now, if you're talking about pass-through on a person, maybe we have something to talk about. But if you're talking about shooting through walls, your buckshot will go farther than an AR round will. A 9mm will go farther than an AR-15 round will. A shotgun slug obviously will. Believe it or not, and it's hard for people to understand, the AR, even with a full metal jacket bullet, will penetrate fewer walls than all the rest of those.