If your Umarex Steel Storm airgun CO2 BB repeater is leaking from the magazine these are most likely the o ring seals that need to be replaced. It solves the issue with leaking magazines when inserted into the magazine slot.

Each magazine contains 1 x larger o ring and 1 x smaller o ring.

Our pack contains:
5 x larger o ring
5 x smaller o ring

Therefore you have plenty to keep you shooting!

*PLEASE NOTE: These seals will not solve leaking CO2 you experience when you directly screw in the CO2 powerlet, this are not CO2 powerlet seals.

It is recommended to use Molykote 111 o ring grease with these seals, and not to remove the magazine from the rifle when not in use.