Nice set up, Kamagong! The C2 is the best looking light Surefire ever made, IMHO. Back in the day, I had a C3, but I gave it away about 10 years ago. I chide myself every time I see a photo of a C2 or C3. Yours appears to be in great condition,too.
Malkoff M61N with VME and 16650. My Maxpedition pocket organizer rides in my cargo pocket and allows me to carry a back up flashlight (Malkoff 1xCR123) along with 2 spare cells in a 7075 capsule from Oveready.