If you're both thinking of getting in on a game check out the games and events section as well and see if you can get AV'ed which will open up a whole new world to you. I don't know what NS is like in terms of AV reps and where games are held but it's worth checking out anyways.
Note that to be AV'ed you should be an "active player" (or play alongside your son) and not act as a "proxy" for your son to get guns. We are very protective of this sport and being on such thin ice already we have implemented this system as a precaution to governmental action (ie. bans).
PS: Those fake shotgun shells (as well as any mags) are fine to pass through customs so you won't have any problems. What you will have problems with however are restricted/prohibited items such as receivers.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE