Okay... so you'll have to excuse my ignorance being a Canucker and all and I feel the need to further preface this by saying I am not "anti-gun" but am "pro-training/licensing/registration"... which isn't such the political firestorm up here as it is in... well whatever. You get it.
But this is more out of technical curiosity because I've never actually handled a handgun (let alone a fancy modern one like that Walther)...
1) What's the double trigger thingie for?
2) What's that (what looks to be some kind of swivel arm) directly above and/or to the right of the trigger?
3) What's the weird bent thing on the "track" (or whatever that's called) directly above the front/to the left of front of the trigger guard?
4) Was this gun designed by Walter Mathau or a guy named Walter who had an unfortunate speech impedement?
Inquiring minds want to something something, blah blah... woof woof...