There's a great argument to be made that no one needs to own an assault rifle of any kind. But if you feel the need to have one around for protection or survival, the XAR Invicta Folding Rifle is an excellent choice. Thanks to a precisely-engineered, rock-solid mechanism, it folds in half on its axis without any loose parts to misplace. This allows it to be deployed in seconds and then quickly stowed away, while still offering pinpoint accuracy. Based on the AR15/5.56 platform, it's also compatible with a host of accessories.