Perhaps I should not have used the term hammer, but if you look at the back of the LC9 you will see what I refer to as the hammer in the back position (like a cocked hammer) prior to pulling the trigger. Once the trigger is pulled this "hammer" is forward and not visible. The LC9 does not have restrike capability so you must pull the slide back to reset (cock) the hammer. When in this position an application of nail polish makes it easier to see the back of the "hammer". This is not a critical issue since the loaded round indicator would also show if the LC9 was ready to fire.
And welcome to the forum!