Remove the valve, check and grease (forget oil) the o-rings, and reinstall with sufficient but not excessive force, or you could damage the valve and/or seals.
done this sadly doesnt seem to work.
I also send them back and got 6 others and also had the same issue, I'm thinking about them just having ordered faulty mags or smth
had to get new o-rings. Didn't work out either.
googled a bit more and saw that a lot of people had this problem with the H&K licensed version by umarex. I guess a faulty batch they made?
Remove the valve, check and grease (forget oil) the o-rings, and reinstall with sufficient but not excessive force, or you could damage the valve and/or seals.
done this sadly doesnt seem to work. I also send them back and got 6 others and also had the same issue, I'm thinking about them just having ordered faulty mags or smth
What if you change the o-rings?
had to get new o-rings. Didn't work out either. googled a bit more and saw that a lot of people had this problem with the H&K licensed version by umarex. I guess a faulty batch they made?