Spring is the base of the airsoft gun. It is part which notably affecting shooting range.

This one is made of high quality spring steel with proper heat treatment and ground ends. It is suitable for Marui VSR-10 rifles and its copies. It is designed for 7 mm mandrels. The M145 value gives an approximate bullet velocity of 0.2g when using this spring. 145 metres per second (m/s). Just for comparison, the Tokyo Marui VSR-10 has a muzzle velocity quoted by the manufacturer of 80-90 m/s. Some quote the ball speed in feet per second (fps). So this spring increases the gun's performance to 475fps.

Weight: 26g

Spring type/spring force: M145

Length (mm): 223

Width (mm): 10