In this how-to video, you will learn how to use different retention devices for your gun. These devices will allow you to shoot faster. A level two holster has a locking mechanism, which locks automatically once you place your gun in. A competition holster does not have a lock, allowing you to shoot faster. A level three holster has maximum security, usually used for law enforcement. This has a thumb break along with the two other locks. You can also practice using a transition from a rifle to a hand gun. The holsters are dependent on your use, so make sure you choose right. This video offers great advice on the type of holsters you can use.