Constructed from ultra-strong Silicon Steel for maximum longevity
Variable pitch design gives light compression and fast returns
Designed to be used with 9mm spring guides
Perfect for use with PDI VSR pistons
Manufacturer:PDI
Specifications:
Inner Diameter: 11mm Outer Diameter: 13mm Spring Velocity: ~450 FPS (measured with a 0.20g BB) Compatibility: For all Tokyo Marui, JG BAR-10, WELL VSR-10, G-Spec, and other compatible bolt action sniper rifles with VSR-10 compatible internals Material: High Grade Chrome Silicon Steel
