hey, im really new to spearfishing, and it never seemed like something i was going to pursue, but as i was rooting around in my attic, i found an old speargun that my dad bought when he was in greece, and used once. it is an "Arrow 70-4L" from BalcoSubs. I have searched on the internet for any information about it, but i have found none. It is of small size, and a little rusted. the waters around where i live (ireland) are filled with coldwater fish, including mullet, gurnard, pollock, and even salmon. some of these fish can become huge, and i was thinking that my gun might be too small. does anyone know anything about this gun, and would i be advised to buy a new one before i go out hunting? thanks in advance, daniel.