If you use pellets, the manufacturer suggests that you use only wadcutters.

• 90-Day Limited Warranty
• CO2 pistol
• Uses 12-gram CO2 cartridges
• Semiauto
• 20rd removable BB stick mag
• 3-dot sight system
• Blowback
• Manual safety
• Metal slide
• Ergonomic design aids sighting
• Weaver accessory rail

Specifications:

• Loudness: 4-Medium-High
• Weight: 1.60 lbs
• Barrel Length: 3.80″
• Overall Length: 8.20″
• Barrel: Rifled
• Action: Semiautomatic