Airgun pistols, like airgun rifles, come in various types based on their power source, mechanism, and design. Here are some common types of airgun pistols:

1. CO2-powered air pistols: These pistols use small CO2 cartridges to provide the power for shooting. The CO2 gas is released when the trigger is pulled, propelling the pellet or BB. CO2 pistols are popular for their ease of use, semi-automatic or revolver action, and versatility.

2. Spring-piston air pistols: Spring-piston pistols work similarly to spring-piston rifles, using a coiled spring and a piston to compress air. Cocking the gun compresses the spring, and when the trigger is pulled, the released air propels the pellet or BB. These pistols are typically single-shot and require manual cocking for each shot.

3. Pre-charged pneumatic (PCP) air pistols: PCP pistols are powered by a pre-charged air reservoir, just like PCP rifles. They offer high accuracy and multiple shots before needing to recharge the air reservoir. PCP pistols are commonly used in target shooting and competitions.

4. Pump pneumatic air pistols: These pistols require the shooter to manually pump air into the compression chamber before each shot. The number of pumps determines the power of the shot.

5. Gas piston (Gas Ram) air pistols: Similar to gas piston rifles, these pistols use a gas-filled piston instead of a coiled spring. The gas expands when the trigger is pulled, propelling the pellet or BB.

6. BB pistols: These pistols are designed to shoot steel BBs and are typically CO2-powered or use a pneumatic pump mechanism. They are popular for casual shooting and plinking.

7. Pellet pistols: These pistols shoot lead or alloy pellets and are available in various power sources, including CO2, spring-piston, and PCP. They are often used for target shooting and pest control.

8. Revolver air pistols: Modeled after traditional revolvers, these pistols can be either CO2-powered or use a spring-piston mechanism. They have a rotating cylinder that holds multiple pellets or BBs.

9. Semi-automatic air pistols: Many CO2-powered and PCP pistols offer semi-automatic action, allowing for rapid-fire shooting without manually cocking the gun between shots.

10. Bolt-action air pistols: Some single-shot air pistols have a bolt-action mechanism that requires the shooter to manually load and cock the gun for each shot.

As with airgun rifles, the popularity of airgun pistols can vary depending on the region, shooting preferences, and local regulations. It's essential to consider your shooting needs and check local laws before purchasing an airgun pistol.