Hello, I am French, but that does not matter, I just made a idea that seems fair and interesting ! So here is my concept, We've all seen houses with doors impenetrable, but if we added a function, with doors locked, blocked, etc ... Imagine, fire mode, you smash a door with an ax ! Ball or shot, gun, or a key tool to open locks ! The choice of opening or closed ! So this is an idea that seems logical, thank you and tell you think of that !