Airtech Studios Hop-Up/Inner Barrel Stabilizer O-Ring - 10 Pack

The silicone o-rings are designed to replace the stock spring that is normally placed onto the inner barrel/  front of the hop-up chamber. It will improve the stability of the hop-up chamber significantly by restricting the amount of movement that is caused by the rifle while firing ie. BB loading movements, air nozzle head displacement, and generally gearbox vibrations.