Mercury Rise MUB50 Self Defense Pistol 50 Cal 400FPS

• Semi-Auto Firing Mode
• Under Barrel Magazine Loading Design
• 3-in-1 Quick Piercing CO2 chamber System
• Effective Range: 30 Meters
• Operates on 12 Gram CO₂ Cartridges (NOT included)
• Picatinny Rail For Mounting Your Own Accessories
• Shoots .50 Caliber Spherical Projectiles
• Velocity Adjuster From 250 To 400 FPS
• Affordable Spare Magazine (amazon.com/gp/product/B09FS9P7K3)

Dripping a little bit of paintball marker oil lube on the outlet of CO2 cartridge and using this anointed CO2 cartridge in the pistol grip when you hear CO2 hissing sound or after every 30~50 rounds you shot with unanointed cartridges.