In the U.S, the safest airsoft FPS would be under 400 FPS (outdoor) and under 350 FPS (indoors). The high FPS range for airsoft guns is usually between 400 to 450 feet per second.
Nevertheless, players should always check the specific regulations and guidelines of their field or event to ensure their airsoft gun complies with the allowed FPS limits.
The hardest hitting airsoft gun is based on the Mauser Schnellfeuer 712 Broomhandle. The average paintball velocity is about 190 mph.
Most airsoft guns used for field play will have an effective range of around 43–67 m, depending on gameplay. The maximum effective range of field-legal airsoft guns is all around 100 m with a highly upgraded sniper rifle replica.
Electric airsoft guns are simple, accurate, faster, automatic, more powerful and players prefer them to spring action replicas.
Anything lower than 300 FPS could ruin the game and anything much higher can potentially injure people, so watch FPS limits if planning to play in a field.