Leaves no doubt - Geissele Posi-Snap Safety Selectors

With this safety, there will be no doubt about whether or not you are in Safe or Fire (or Burst/etc, if you have access to Super Fun Mode).
When you move the safety lever from one setting to the next, the click is both tactile and audible.
The safety levers that come in your average LPK can feel squishy. This is a result of how the detent channel is designed and machined into the shaft of the safety lever. The especially bad ones can even slide from one setting to the next without you telling it to! No bueno!
The Posi-Snap works beautifully. If it's in Safe, it'll stay in Safe until you make it go somewhere else. Likewise, if it's in Fire, it'll stay in Fire until you make it go somewhere else.
If you need ambidextrous safety, Geissele makes an ambi version!