Airsoft guns shoot plastic pellets at velocities from 100 ft/s (30 m/s) for a low-end spring pistol, to 500 ft/s and beyond for heavily-upgraded customized sniper rifles. Most non-upgraded AEGs using the Tokyo Marui system are in the middle, producing velocities from 270 to 300 ft/s (80 to 90 m/s) with the exception of companies such as G&G, G&P, Cyber gun, Aftermath Airsoft, D-boys, Cyma and Jing Gong which manufacture guns that produce velocities of over 328 ft/s (or 1J with a .2g pellet) stock. The internal components of most guns can be upgraded which can increase the pellet velocity significantly. Using heavier pellets (.25g, .3g, etc.) will significantly reduce the gun's muzzle velocity, but can increase accuracy at range and reduce susceptibility to wind drift. Conversely, lighter pellets may travel further but are less accurate. High-velocity AEGs often employ heavier pellets, as the velocity penalty does not affect them as much, while the accuracy benefits remain. Most high-end AEGs, such as Classic Army and Tokyo Marui, should not be loaded with anything lighter than 0.2 g pellets, as the lighter pellets (0.12 g, 0.15 g) are typically made for low-end guns, and are not built to the same quality (such as surface smoothness). The stresses the pellets go under upon firing could shatter lighter or poorly made pellets as they leave the barrel, potentially damaging both the weapon and the target.
Airsoft guns can be modified to increase pellet velocity, rate of fire, or reliability. For an electric airsoft gun, the pellet velocity can be increased by simply upgrading the mainspring. Doing this will increase the air pressure subjected to the pellet produced during operation. But due to the higher forces at play, it is advised that other parts should be upgraded together with the mainspring in order to maintain a high level of reliability. The rate of fire is increased by using a battery with a higher voltage, high speed ratio gears and/or a high speed motor. Rates of fire can be increased to over 20 rounds per second with very few upgrades, but with careful selection and extreme modification of gearbox components, rates of fire in excess of 50 rounds per second are not unheard of. In the case of gas guns, a higher pellet velocity can be achieved through the use of different types of gases and/or changing the valve. It must be noted that some gases have detrimental effects to some plastic components inside the airsoft gun.
Airsoft guns commonly come with mounts or rails on which you can add external accessories. Some common customizations added are flashlights, scopes and lasers. Since some airsoft guns have the exact external frame as real guns, you can use these external parts meant for real guns, but the opposite does not apply. In no way can an airsoft rifle be modified to shoot real ammunition. In most cases, add-ons are more for aesthetics rather than performance. However, some scopes must have scope rings (which are not usually included in airsoft gun packages) that are used to mount the higher end scopes to a default rail mount.
Airsoft guns can be modified to increase pellet velocity, rate of fire, or reliability. For an electric airsoft gun, the pellet velocity can be increased by simply upgrading the mainspring. Doing this will increase the air pressure subjected to the pellet produced during operation. But due to the higher forces at play, it is advised that other parts should be upgraded together with the mainspring in order to maintain a high level of reliability. The rate of fire is increased by using a battery with a higher voltage, high speed ratio gears and/or a high speed motor. Rates of fire can be increased to over 20 rounds per second with very few upgrades, but with careful selection and extreme modification of gearbox components, rates of fire in excess of 50 rounds per second are not unheard of. In the case of gas guns, a higher pellet velocity can be achieved through the use of different types of gases and/or changing the valve. It must be noted that some gases have detrimental effects to some plastic components inside the airsoft gun.
Airsoft guns commonly come with mounts or rails on which you can add external accessories. Some common customizations added are flashlights, scopes and lasers. Since some airsoft guns have the exact external frame as real guns, you can use these external parts meant for real guns, but the opposite does not apply. In no way can an airsoft rifle be modified to shoot real ammunition. In most cases, add-ons are more for aesthetics rather than performance. However, some scopes must have scope rings (which are not usually included in airsoft gun packages) that are used to mount the higher end scopes to a default rail mount.