I just bought my first Surefire G2 Nitrlon. Now I wanted to ask and make sure mine is not defective. To turn the light on I have to push a static button that does not push in, but it does allow the entire back cap to be pushed hard enough to turn on momentarily. Then to turn on constantly I have to twist the en cap. I just wanted to make sure because it looks like the rubber button at the back is supposed to push in, but it is actually hard and I cannot push it in, but the force allows the endcap to push the battery and turn it on.