VSR 10 Hop-Up Chamber The Hop-Up chamber uses a new and innovative system for extremely precise adjustment of pressure placed upon the hopup bucking Action Army Smart Hop-Up Chamber for Marui VSR-10 Full CNC Alu Construction Adjusting the hop-up screw will increase/decrease hop applied by the bucking. The hopup screw makes it possible to make micro adjustments to hop. This Action Army Hop-Up Chamber does a great job at creating a perfect air seal. Compatible with Tokyo Marui VSR10/G-Spec, Well MB02 / MB03
