In appearance, the spring-piston mechanism in the weapon seems outdated and ineffective. The SPP rifle, although it has a rather complicated design compared to other types of pneumatic weapons, is one of the constant samples for fans of sports or training shooting. There are many factors that affect the quality and power of the spring-piston mechanism, so finding a suitable option takes a long time.
Novice enthusiasts very often acquire the SPP pneumatic rifles as basic skills and only after a detailed study of them switch to other types of sports weapons.
The reliability of the spring-piston device is that it does not have a system of bypass valves and a tank containing compressed air. Inside the cylinder, the piston moves to compress the working spring. Thanks to this, the weapon is cocked and holds the trigger in combat position. When fired, the spring is released and with all the force moves the piston, which compresses all the air and pushes the bullet out with a lot of pressure. The SPT rifle is equipped with a fully self-contained device, so no additions are required to use it. It is enough to break the charging mechanism and insert the cartridge into the breech of the weapon.
The PPP rifle is convenient and easy to maintain. It is enough to have small technical skills to disassemble and lubricate the internal parts. The spring-piston mechanism is good in that it has an excellent accuracy of shots for a long time. The main reason for changing the speed of the bullet is the wear of the metal of the combat spring.
For a certain number of shots, the part is deformed. Weakening affects the structure of all mechanisms. Small draft of the spring does not provide the air reservoir with the necessary pressure, thereby bullet speed is noticeably deteriorated. But the PPP rifle is assembled from many parts, which makes it easy and quick to replace worn parts.
Features of firing a weapon with a spring-piston mechanism are that the result and quality of the shots completely depend on the position of the shooter. Retention methods, clothing, and external factors also have an effect. The results of the power and range of a bullet with different types of ammunition are completely different and can confuse the novice shooter. At such moments, beginners begin to erroneously correct sights and carry out sighting again. But these actions are incorrect. After changing the bullet, the results will change again. In fact, it all depends on the quality, weight and diameter of the ammunition used.
With proper maintenance, timely repair and good care, such a weapon will last for many years. To date, there are 1905 SPP rifles that are still in use and still have good technical qualities. Therefore, as a first pneumatic weapon for training shooting, it is a specimen with a spring-piston mechanism that is well suited.