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My fiberglass speargun


Active Member
Aug 16, 2015
Hey team! I wanna to show you my new homemade fiberglass speargun.
After a lot of investigation I found that almost no fabricated mass fiberglass arbaletes on the market and wanna know : why?
And to check is it possible I decided build one by myself.
Lets see this beatuifull speargun:
The barrel:

And the result:

Have to tell you: it is working well, great hardness and of course great balanced. The most important thing for me are: good moving side to side and maximum weight. That I did!
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Reactions: Ropeworkuk
i remember a guy made a fibreglass speargun that looked like something the crew would have used on Jules Verne's "Nautilus". It was cartridge powered and he showed it on "The Inventors" program which was a half hour ABC TV show usually having three inventions per show. A panel of three judged each invention to produce a winner out of the three. From memory it was a Ramset cartridge powered speargun as was the Tapmatic SMG. Last I ever heard of it. Another gun from New Zealand, an arbalete, had a glass reinforced barrel, but I think that was a plastic moulding. The grip handle looked like a Sea Hornet cross pollinated with an Undersea trigger mech, but only ever saw one in photos.

I think carbon fibre pushed ideas of fibreglass guns aside, because like fishing rods once carbon fibre appears people went for the stronger material. Old fibreglass boat hulls may have soured thoughts of that material for spearguns. Although continual exposure to weather is something a speargun does not have to face, unlike a boat out on a mooring.
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The bootom line: fiberglass arbalete is the same like carbon but much cheaper! However much hard to work with fiberglass. Furthermore: most carbon stuff producers are working with pre-preg carbon (with epoxy already absorbed) and it simple material in production. While no fiberglass pre-preg material presented.
Despite of carbon is much rugged material, for arbalette you can build much thick fiberglass without problem of weight.
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