Vorsk V12 Performance GBB Fuel is a high-power, propane-based airsoft gas designed for maximum FPS, recoil, and performance in cold weather, featuring silicone lubricant for seal conditioning and ideal for full-metal GBBs (Gas Blowback) and heavy slides. It's Vorsk's most potent blend, providing enhanced force and consistency, but should be used cautiously, primarily in upgraded or metal-slide airsoft guns, not plastic ones, to avoid damage. 
Key Features & Uses
High Power: Delivers increased muzzle velocity (FPS) and stronger recoil.
Cold Weather Performance: Engineered for stable operation in cooler temperatures (around 5-20°C).
Lubrication: Contains silicone oil to maintain O-rings and seals, preventing drying and enhancing longevity.
Target Platforms: Best for full-metal GBB pistols, SMGs, and rifles, especially those with heavy slides or upgraded parts.
Propane-Based: A non-CFC (Chlorofluorocarbon) blend for responsible use. 
Important Considerations
Not for Stock Plastic Slides: Its high pressure can damage plastic slides or weaker internal components, so always check your replica's manual for suitability.
Part of a Range: Vorsk also offers V6 (standard) and V8 (enhanced) for different performance needs.