*Fixed screw design can be fixed whole chamber with the frame.
*Inner barrel horizontal adjustment serew design.
*Damping prevents reverse design, and tightening the screw can ix the wheel.
*Hop-up adjustment by hand and 2mm Allen key design.
*C Clip with screw design make inner barrel more fixed and center.
*Hop-up bucking wrap-around destgn makes a better seal.
*CNC Aluminum
*for SIGAIR / VFC P320 M17/M18