Key Features:
Works with a disposable lighter (spark ignites gas).
Uses a combustion chamber (often PVC or metal).
Fires small projectiles (like bottle caps, BBs, or foam darts).
Simple & dangerous—high risk of burns, explosions, or injury.
⚠️ Warning: Such devices are extremely hazardous and can cause serious injury or legal consequences. Many countries ban their construction. Always prioritize safety and legality.