When it comes to airsoft gun performance, most people have a tendency to focus primarily on gun models, barrel FPS and gearbox type (ie. full metal versus plastic gear boxes). However, an airsoft’s performance is only as good as the quality of ammunition it fires. There are many different options when it comes to choosing the type of ammunition to use in your airsoft gun. Airsoft BBs come in a variety of colors and include an assortment of features, but the single most important differentiating factor is BB weight.
Almost all gun BBs are 6mm in diameter, but this sig sauer 9mm ammo constancy ends when it comes to weight. Airsoft BBs start as light as.12 grams per BB and can go as heavy as.40+ grams per BB. As a general rule,.12 gram BBs should be used in spring pistols or lower end plastic airsoft pistols and rifles. It’s recommended to avoid using these lighter and usually cheaper BB’s in higher end airsoft pistols or rifles, because they can potentially damage the gearbox and may even void your airsoft’s warranty. Not only will these BBs potentially damage you airsoft gun, but they may also greatly reduce your range and accuracy.
When it comes to using heavier airsoft BBs, it’s really up to your personal preference. As a general rule, an airsoft gun that can shoot anywhere between 250 and 300 FPS is best served with.20 gram airsoft BBs. On the other hand, any airsoft gun capable of shooting in excess of 300 FPS may perform better with a BB weight that is slightly heavier than.20 grams.
In high end airsoft guns, heavier BBs may provide better accuracy at greater ranges, but reduced velocity. For example, if you’re using an airsoft sniper rifle you may want to consider using an airsoft BB around.28 grams in weight. For standard field engagements you should stick with BBs that weigh anywhere between.