Okay then, that makes much more sense. But why hide it as anoter weapon? Why not turn it into a flashlight? It would serve a dual purpose, a light source and a weapon, besides, unless the blade is really flimsy then a switchblades handle would disintegrate under the weight of the blade.
Sorry if I'm being utilitarian, you don't have to if you don't want to
I have a flash light where you twist the top and it turns on but if you twist it all the way then the top comes off with the mirror to give a candle efect si don't have to pan around. In his case, he could have the flashlight as itself but when he twists off the mirror than the top with mirror turns into like a shield or something and the "candle" becomes the dirk.