Why? Well, the last episode entitled "Meat Chopper" has so much stupid in it that my head actually hurt when I was done watching it. I've given this show the benefit of the doubt for as long as I can possibly stand. Every episode ups the ante to absolute ridiculousness - First they built guns, then they built a 2 gun rig, then a 3 gun rig - this episode, a 4 gun rig and next week they are suppressing a grenade launcher. Is it interesting to see them make impractical compensation trophies, but now it's getting out of hand. But that's not even what is bothering me.
Case in point - Lithium polymer batteries do not explode when you shoot them.
Evidence:
Did it end there? Heck no! I've got one better...
So some guy (probably the key grip) comes in and says, "I'm left handed and I need my AR15 changed over to left hand...
As a design feature, the AR-15 and its variants deflect brass at a 1 o'clock position (read: forward) so the military doesn't have to make a bunch of left-handed rifles.
"A spent case deflector was incorporated into the upper receiver immediately behind the ejection port to prevent cases from striking left-handed users." [Venola, Richard (2005). "What a Long Strange Trip It's Been". Book of the AR-15 1 (2): 6–18.]
My favorite part is the pretty animation, showing the brass ejecting backward. Now watch what happens when our lefty shooter fires his newly modified AR-15..
Yep, that's brass ejecting forward. Plus, why couldn't this idiot just buy a left-upper - it's just 2 pins to change - but that leads my suspicion that 98% of this show is scripted.
But wait! There's more - and this is the one that made my eyes bleed...
Some guy comes in with a pair of what he thinks are WWII Walther P38's for appraisal... on the same week they are building MG-42's... (coincidence?)
Anyway, Will really knows about guns so he lets him know that he as a P38 and the later (non-WWII) aluminum framed P1. Then he goes into a small history snippet of the Walther P38 and the geniuses at Discovery roll
this clip. Pay close attention to the German holding the "P38" - Notice anything?
Yep, that's a Luger...
Not a P38

A Luger...
Good job, Discovery Channel hippies. Way to nail the learnin' factor! What burns me is that this is the Discovery Channel - you know, for science 'n' stuff! At this point it may as well be Tru TV.
I can't tell you how done I am with this show. I tried, I really did - but there's only so much stupid one can take.