The 
Vorsk V6 Performance GBB
 uses green gas (a propane-based mix) as its fuel. It is a standard-pressure gas designed for use in most metal-slide GBB pistols in warm weather. 
Vorsk GBB Fuel Options
Vorsk offers a range of GBB fuels with varying pressure ratings to suit different airsoft replicas and weather conditions: 
VORSK V6 Performance GBB Fuel
: The standard formulation with a 175 PSI output, ideal for most GBB pistols and SMGs in CQB and warmer environments (similar to Abbey Ultrair or NUPROL 2.0 green gas). It contains silicone lubricant to help maintain the O-rings and seals within the airsoft gun.
VORSK V8 Performance GBB Fuel
: A boosted, higher-pressure formulation (around 190 PSI) that offers increased FPS and stronger recoil, suited for metal-slide pistols or use in colder months.
VORSK V12 Maximum GBB Fuel
: The highest power option (around 220 PSI) designed for heavy bolts/slides and optimal performance in cold weather conditions, such as for GBB rifles and SMGs.