Replace broken parts in your compatible L96 series airsoft rifle with this high quality upgrade set from WellFire. Each set includes a spring, piston, and spring guide all crafted from steel for maximum durability when used in high powered rifles. The universal design of this upgrade set allows it to be used in all WellFire L96 series airsoft rifles including MB02, MB03, MB07, MB09, MB10, MB12 & MB12. This spring upgrade brings your rifle up to 550 FPS, proving further range and increase accuracy. Maximize your rifles full potential with this L96 Series Upgrade Set from WellFire.