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.

- Stabilize the hop-up system
- Consistent hop on the BB
- Uniform FPS from a stabilized compression
- 10 Pcs

Manufacturer : Airtech Studios