Just propane. Semi-auto only (Should have clarified that, sorry)
I found that I could get close to if not a full mag out of a single fill if I kept them in my pant pockets before I used them opposed to the pouches on my plate carrier. Next time I'll tape hand warmers to the mags :P
NSWDG Enthusiast, Milsim Junkie, Tactical Tailor, Kit Calibrator.
The rants & ramblings of an everyday Weekend Warrior.