April 11, 2017 0:00
// Pneumatic weapons
To date, the range of pneumatic weapons in stores is so large that the selection of the “right” rifle, even for more or less experienced shooters, without outside help, is very difficult. One of the most popular types of rifles are compression rifles. But what if you want even more power and comfort when shooting? In this case, it is worth paying attention to the multicompression type of pneumatic weapons.
Today, pneumatics are divided by power into three main types, depending on the design:
– with spring piston;
– using compressed carbon dioxide.
– with an air storage chamber;
In a spring-piston weapon, the piston moves due to a compressible spring. Each time the spring is compressed by breaking the barrel or using a lever located under the barrel. In a weapon using carbon dioxide, the shot is fired due to the compression of carbon dioxide contained in the cans. In a compression weapon, air is compressed in the cylinder by a single movement of the cocking lever, which is the source of energy that pushes the bullet out.
The power is achieved by pumping the air chamber with several movements of the pump lever. At the same time, it is possible to regulate the power, depending on the number of pumps. The shooter can adapt the power level for short or long shooting. For safety reasons, most multi-stroke guns are usually designed to jam the pump lever when the tank has reached the maximum pressure limit.
Multicompression pistols and rifles are very popular in the UK and Europe because of the accuracy of shooting and ease of use. They are widely used in ISSF 10-meter air pistol and small arms shooting, in Field Target sports shooting and are usually equipped with telescopic sights. Such rifles are shorter and lighter with sufficiently powerful shooting characteristics. The main disadvantage is that recharging is slow, and it takes time and additional movements.
The valve of the air tank is held closed by a spring and air pressure. The spring pressure is constant, and the air pressure decreases with each subsequent shot. As a result, when the air pressure reaches its peak, the valve opens less fully and closes faster than when the air pressure is lower, resulting in a similar total volume of air passing by the valve with each shot. This leads to self-regulation, which gives greater consistency of speed from shot to shot. A well-designed multicompression rifle ensures the consistency of the shot as the air tank is exhausted.
Calibres of multicompression rifles
*Caliber up to 4.5 mm inclusive does not require a special permit on the territory of Ukraine
The air rifles of the American manufacturer Crosman use bullets of the following calibers: 0.177 (diameter 4.5 mm); 0.22 (diameter 5.5 – 5.6 mm); 0.25 (diameter 6.4 mm); and even 0.357.
The caliber of the Crosman M4-177 and Crosman 2100 classic rifles is 0.177 inches (4.5 millimeters). This is the most common caliber for target shooting. In addition, BB balls of the same caliber can be used in both rifles. Most multicompression rifles are equipped with a multi-loading system that allows you to load more than one bullet. A comparative analysis regarding the amount of ammunition in the magazine and the average velocity of the projectile is given in the table.
The advantages of multicompression rifles include: