O ring flew out from firing while in open bolt

Nothing to worry about. Take the barrel out measure the inner dia then find an oring with a inner dia a little smaller and an otter dia a little bigger. Gently slide it into the groove inside the barrel. I've done it to other gun like this, Impact may be slightly different. Hope some else cab Chim in?

Hi! I have a the o-ring. It landed on my pellets. I will do it now. Now, i can sleep well. Thank you.