Corsair-X Helmet - Tsubasa - XSVAS Shield Mechanism. VAS mechanism with a variable axis incorporating a moving pivot point. By combining the pin trajectory, which is based on an imaginary axis with the two trajectories of the double pivot point slot, the shield opens and closes smoothly even with the much lower shield mount position. A dual function lever releases both the side cover and shield pin for quick and simple shield removal. Being able to see the shield mechanism allows