Well,
I see I do have one amazing thing in common with Andrew - I used to race sailboats, too;-)
I don't think I am asking Salt&Pepper to stay landlocked in front of his computer all winter. If it came across like that, I am sorry
.
Also, my point is not only about safety, my point is about getting an introduction to spearing in a way where it'll actually be fun right out of the box. Where you don't just order a shitty newbie gun on Scubastore in the wrong length, and the rigging breaks on the 3rd outing.
I used to teach kids to sail optis and we wouldn't just throw them in the dinghy and say: "off you go". I've heard from enough friends whom had to start like this and either they gave up sailing or it took time to overcome a frightful start.
But I guess, this is different. Opti kids are younger and Salt&Pepper seems to already be cool in the water, so it's more about adding a gun to that. Not a whole new world.
I just guess, my sailing instructor mentality/personality has stuck.
Anyways, I still don't think it is bad advice to spend 2-3 days trying to find a local spearo to help hook him up with the right gear from the very beginning.
Also, I didn't spear when I was 14 and I don't know his strength, so I have no clue what he can load.
But I've tried driving an hour to a dive spot in Denmark and dropping in with a newly acquired 75mm bandgun with a very short 18mm rubber, that I could hardly load - I finally did, and it messed badly with my shoulder. The dive was shitty and I didn't feel like shooting the gun in fear of having to reload it, haha. I've also dropped in the Andaman Sea with a pneumatic that was too pressurized (before I got a pressure gauge), but luckily I had another gun on the boat, so though not the right length for what I intended to hunt, it was less of a setback.
@Salt&Pepper, Andrew is right - if you can find a local shop, then that could work out well. Some shops are just fishing tackle shops that carry a bit of spearing gear which they may or may not know much about. But maybe there's a really good one.
Also, Andrew is right in that once you are in the water, you do learn a lot. Fast.
If you have to drive/travel a bit to go to the shop, bring an adult - or check with the shop if there's an age limit to buying. No fun bussing it somewhere with money in your pocket just to find out you have to be 18 to buy a gun. (Which I read is the case sometimes).
If you need to buy online, then let us know and I am sure people here can give you a general idea of what to look for or even a few specific options if you give us your budget.
If you buy a set of thinner rubbers, too, you should also not have to have loading issues and as your technique improves you can shorten them or change back to the original ones.
If you wanna buy secondhand, I can recommend buying from the Italian forum here:
http://pescasubapnea.forumfree.it/?f=387295
There are often very good deals on that forum, Italian spearos tend to know their stuff and the conditions should/could be very similar, so my guess is that you could get a very nice gun there, in your length, rigged and in working order.