I have had my axe for around 6 months and have never change an oring yet. After play I always check and clean/relub them. Just depends on how much you use the marker and how you look after it.
hey bud, its not the bolt causing the leak, its the face of the poppet (the little white thing if you take the bolt guide out) the face of that isnt sealing properly, it may have grease on it or its worn, in that case you'll need another poppet face