Is an Airgun Good for Self Defense? Another one of those questions I get asked fairly often that's a bit hard to answer in a few sentences... Not all of us have easy access to a 9mm pistol or even a rifle but many of us can get our hands on an airgun fairly easily and they look real enough, I guess that is one thing they have going for them. But what if the mere sight of what looks like a gun does not scare an intruder off? If you where hoping that would be enough, you may just be out of luck and what if you just brought an Airgun to a "real" gun fight? You are going to be drastically "outgunned" pun intended and here's why. A 4.5mm Steel BB weighs about 5.1 grains and generally you are looking at about 2-3 foot pounds of energy from a CO2 BB gun. Even a .177 caliber lead pellet is only marginally heavier at around 7-8 grains and if you're really lucky you might just get 4 foot pounds of energy out of a CO2 pellet pistol. Read full article here: https://www.replicaairguns.com/2014/2/26/is-an-airgun-good-for-self-defense.html