Air gun (English: Air gun) is a general term for guns that launch projectiles powered by pressurized gas. It is a pistol that does not use light weapons that launch gunpowder and relies on the pressure of compressed air or gas to shoot the warhead. The prototype of the air gun is the ancient drum pipe.

The primary disadvantage of the secondary pumped air gun is the time required to pump the air. Assuming that the first shot misses the target, it is impossible to make up another shot. By the time you hit the gun again, the prey would have run away. When pumping up, the first few times are relatively easy, and the second time is more difficult. The accuracy of the multi-pump air gun is usually. In addition to human operation errors, there are too many change factors in the pumping process that make the multi-pump air gun unable to obtain better accuracy. In order to obtain better accuracy, people prefer another method of pumping air guns: single-stroke Pneumatic or simple SSP. As the name implies, a single pump air gun requires only one pump per shot. Advanced ten-meter race air guns, such as Beeman/FWB601, usually use a single pump type. One-to-one, correctness, and no recoil are the primary benefits of a single pumping type. That's why top shooters usually love this power source. The defect of the single pump pressure power source is that its power is low, but for the short range of ten meters target, its accuracy is the decisive factor, power is not necessary. The pneumatic air gun is a pre-compressed air type (Pre-Charge Pneumatic or PCP for short), which combines the respective interests of the repeated pump type and the single pump type. The firing power can be high or low, and you can regulate it.

The selection of pre-filled compressed air power source of the air gun has high accuracy, no recoil, and (when shooting) does not need to pump air. Each time you inflate the gas storage bin, you can hit multiple shots. Inflation does not require a lot of force, because the compressed air is pre-pumped into a diving air bottle with an air compressor. When inflating the air storage tank of the air gun, you only need to use a section of high-pressure air pipe to connect the air gun and the gas cylinder through a barometer. Pre-tightening pneumatic guns are primarily used for field-target (or FT for short) or small animal hunting. Some of these types of air guns can be fired in bursts. Those hunters with poor accuracy can go on to shoot a second shot if the first shot is missed.

Pneumatic air gun using tight air as the power. The manner in which the air is compressed into the air gun depends on the type of air compressor.

One of the most common types of pneumatic equipment is called the Multi-Stroke Pneumatic (MSP ), or Pump-up, or Multi-pump type. Looking at the text, the multi-ram air gun only injects a small amount of air at a time, but it requires pumping many times (ranging from 2 to 10 times) like a pump to fill the air in the gun to a satisfactory pressure and enable the bullet to shoot at a decent speed. The vast majority of multi-pump air guns are small in size, light in weight, no recoil, and medium in power.