This might be the most verstile and powerful among airsoft 40mm grenades looking at the power source. US players can grab these at Evike.com... "Charged with Top / Green Gas, the S-Thunder Airsoft Grenade can be filled with BB pellets, paintballs, pepper balls, powder balls or color powder and shoot these over great distances with a loud sounding bang. It can be used with any 40mm Launchers available in the market, or triggered by hand. The pellets or paintballs can stun the enemy and the colored powder can cause visual impediments to their movements. The unit is shipped with a standard core for Top / Green Gas, but can be used with high power gas for more power by replacing the core with the High Power Replacement Core (ACC-XP02), sold separately.

• S-Thunder "Loudest" Multi-Purpose 40mm Airsoft Gas Grenade (Blue) / Co2 Core
• S-Thunder "Loudest" Multi-Purpose 40mm Airsoft Gas Grenade (Green/Gold) / Co2 Core
• S-Thunder "Loudest" Multi-Purpose 40mm Airsoft Gas Grenade (Red/Gold) / Co2 Core

SPECIFICATIONS:

• Size: 4cm diameter, 11cm height
• Filler: BB pellets, Paintballs, Colored Powder
• Filler Volume: 80 BB Pellets, 7 x 11mm Paintballs or 4 x 17mm Paintballs
• Powered by: Top / Green Gas / Propane Adapter / Co2
• Sound Volume: 78-110dB
• Effective Distance: 20-30m"