The original Sig 556 safety lever is short and has sharp edges on it. It's very awkward to engage and disengage.
The Krebs safety lever fixes this short fall perfectly.
You can quickly snap off the safety when bringing the rifle to bear and be ready for action where before it was very difficult to do.
Flicking the safety on is just as easy as the tip of the lever is right at your thumb.
If you would like to improve the factory safety lever on a Sig 556 rifle this is your chance. Marc Krebs said he only did a run of a 100 of these safety levers so you better call in and get it!