I decided that I wanted to add a little HP and MPG to my car:

2008 Challenger SRT8
So I took it to the dealer and had them install this:

K&N Air Intake - I now get 436 HP & 17.5 MPG
While waiting for the installation I drove by the local gunshop, and saw a sign, which drew me in...

Bushmaster AR-15 (spitting image of the M-4 I had in Afghanistan)
After picking up my car, I went to the pet store and adopted this fellow:

Zack.
Those were my Evil Black Purchases for the week.