PolarStar Airsoft VSR-10 Light Weight 45 Piston with Delrin Glide Rings

"This is a great piston. Probably one of I best I have used. It gives great compression and moves perfectly though the gun. Please note that the piston shown is actually the 1st gen edition, the new one has smaller glide rings, a darker blue color, and a metal "Bubble" towards the top.

This piston beats the LayLax and possibly its PDI counterparts.