You can solve the problem the same way PDI improve the air seal in their cylinder head. They put a little O-ring into the nozzle where it touch the hop chamber (and if you look carefully, you could see that the VSR cylinder head is the onliest from PDI to use that "mini O-ring improvement", the L96, M24, M40, doesn't have that problem because of the chamber desing).
Or you could do a new cylinder head and avoid the edges at the end of the nozzle. At last you will have to face the lack of quality in the metal finish =P
Anyway, the mags of the VSR10 and the CA M24 were designed by a cheap work team, because they are made from thin plastic, and they break easily with an upgraded rifle, specially the mag turret that feeds the bb into the chamber. When I first see the M24 mag from CA I was about to cry, I had experience with the Maruzen (and clone copy the strong mag from the maruzen) type 96 mags, and anyone at first sight could see M24 one are cheap and toyish when L96 ones will last forever, VSR are nearly the same (and King arms have a Hi Cap mag for VSR with the SAME problem too). Is the biggest problem with M24, and a big one in VSR (the other is the missfire because of the 45º trigger instead of the 90º in the other spring rifles).
If I were you I go on a new cylinder head or try to cut the edges and retape it to have a good seal.
Y antes de que alguien me diga nada, si no es moderador no me voy a molestar en entrar en una discursion absurda sobre idiomas, asi que no os molesteis =)