Please note

Power Source: CO2

All modes feature a 10 minute auto shut-off to conserve batteries

Utilizes the KWA NS2 gas blowback system

System : Gas Blow BackAction : Semi autoVelocity : ~ 360 fps with extensionVelocity : ~ 310 fps without extensionLength : 180 mmWeight : 775 gHop up : AdjustableGas : CO2Capacity :21

ASG Bersa Thunder 9 Pro 4.5mm CO2 BB gun SCORPION Please noteOriginally developed by BERSA, as a military law enforcement sidearm, the Thunder Pro HC was built to perform under adverse conditions and provide decisive stopping power. This is a semi automatic 4. 5 mm (. 177) airgun version fully licensed by BERSA. It is powered by a 12g CO2 cartridge stored in the grip using the easy load system and the BBs are put in a removable stick magazine. The Thunder Pro HC is a lightweight, full sized handgun, with a