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Making Guns

Printed From: The Fishing Website
Category: Diving
Forum Name: Spearo's Corner
Forum Description: Free-divers & spearos chat about their sport
Printed Date: 25 Apr 2024 at 7:40am

Topic: Making Guns
Posted By: MadeYoung
Subject: Making Guns
Date Posted: 21 Aug 2023 at 2:24pm
Hey everyone,

Wondering if we have any gun makers on here?

Would be cool to see some custom gun builds and also share ideas and test results.
Maybe even meet up if someone has a pool and do some shooting practice!

I myself have made a couple guns starting from an ambitous timber double roller as a first gun then onto multiple different arangements of rollers, then comming back to conventional two bands. I am now making guns straight out of carbon fiber.

I think it would be cool to have good database of spearguns used in nz and design specific custom gun that meet our conditions, so please upload some pics and share some ideas!


Posted By: MadeYoung
Date Posted: 21 Aug 2023 at 2:33pm
Maybe i should start. Tongue
Here is my 2 band full carbon 110 with 85cm of band stretch 14mm small id bands at 350 percent stretch 7mm spear. full custom carbon body with carbon handle. needs alittle bit of balancing to finish it off but hopefully will be an easy swingable snapper snooping weapon. 

do you think a reel is mandatory for snopping? 

Posted By: Reel Deal
Date Posted: 21 Aug 2023 at 3:06pm
Im no spear fisher well the odd flounder 🥴 but that’s impressive work you have done there. How did it work out $$$ wise? Worth making or buying?

The gods do not subtract from the allotted span of men's lives the hours spent on fishing - Assyrian Proverb

Posted By: MadeYoung
Date Posted: 21 Aug 2023 at 3:50pm
Hey reel, $$ wise if you have the knowledge and the gear why not! me personally i did not have the gear but wanted to learn about composite techniques so was a good project to take on. 

dont know the exact cost break down but a list of things needed is something like,

(off the shelf)

(hand made)

If someone wanted to make one out of wood (highly recommend for first project) you could buy all the off shelf parts top quailty for around 350ish buy some hardwood and go at it (assuming you have wood working tools). With wood you could also laminate with epoxy and finish with epoxy but thats another added cost. 

Posted By: smudge
Date Posted: 21 Aug 2023 at 6:05pm
I have no idea about spearguns but I always admire those with a DIY streak. It looks pretty cool to me.

Best gurnard fisherman in my street

Posted By: MadeYoung
Date Posted: 22 Aug 2023 at 10:01am
Thanks Smudge hopefully shoots as good as it looks.

Posted By: e.m.p!
Date Posted: 23 Aug 2023 at 9:52pm
wow, that is an impressive built. I made two guns so far and have access to a wide range of tools, but unfortunately not a lot of time nowadays." rel="nofollow - Here you can see my lockdown project i still use on most dives. I have quite a bit of hardware lying around (bit of a hoarder and always stocking up when overseas). Keen on seeing your roller, post some pics please!

Posted By: MadeYoung
Date Posted: 24 Aug 2023 at 7:48pm
Wow that gun you made is extremely nice! Handle is a masterpiece. How is everything holding up on the gun any issues anywhere? What other parts are yah hoarding anything exotic like that flopper 😄 I'll upload my roller soon.

Posted By: MadeYoung
Date Posted: 24 Aug 2023 at 7:56pm
Carbon roller

Running 16mm bands at around 350 percent 7mm hunt shaft ermes double roller mech full carbon body muzzle and handle muzzle is my own design with forged carbon side plates rollers are 3d printed with ceramic bearings.

Probably the nicest shaft I have ever had with the ermes mech everything is very smooooooth.

The body shape I have designed is made for a roller so the bands lay very nice inside grooves on the underside of the gun

Posted By: e.m.p!
Date Posted: 28 Aug 2023 at 11:34pm
wow, that gun is a work of art. I have a handful of Ermes double roller trigger and the pulleys with the ceramic bearings still lined up for some gun in the future. Also some wacky C4 rubber, can't wait to see how that goes. My next one I'm planning to get cut with a cnc, but I need to get better in fusion first. Time is not on my side....
Can you tell a bit more about your carbon gun? Did you vacuum form it? What core? And what diameter do the muzzle roller have? I've had an invictus inverter in my hand the other day, there are sooo may cool details, but will probably vaporise any fish shot with, haha

Posted By: MadeYoung
Date Posted: 30 Aug 2023 at 8:24am
Cheers for the kind words! 

The ermes double roller mech are so so very nice. the ceramic pulleys are for inverted roller?

You can see the mould off to the right of the pictures its the white thing.
Method i used was wet lay vacuum bagging in a mould. Because i use a mould i dont have an internal core only stiffeners at certain position to help transfer load from top skin to bottom skin. When i lay the carbon i always make sure to know what the gun will be as an inverted roller will need more reinforcement on the top of the gun while a conventional gun will need more on the bottom, a roller can be even top and bottom. The muzzle roller diameter is different for most of my guns as when i drill the holes it can be up or down a couple mm. I make them big enough so the rubbers dont rub on the body but small enough that the rubber line up nicely with the shaft.  

Ill do a write up of the inverted next but would like to go test it first. anyone got a pool in auckland willing to let me shoot some foam Tongue.

Posted By: MadeYoung
Date Posted: 29 Sep 2023 at 8:46am
Here is my inverted roller Running 7.5mm shaft (very short) 3 pairs of 16mm small id bands first band at 360 percent others at 320 percent ermes double roller mech full carbon body handle and muzzle custom rollers with ceramic bearings ronstan pulleys and custom carbon plate holding all the crazy lines together.

Carbon body is 8 layers of 200 GSM twill with specific areas eg trigger area with more reinforcement.

Tested all the guns in the pool and I must say I really like the inverted roller not only does it sling the 7.5mm shaft at Impressive speed with very little recoil the shots at 5m are very accurate!

I think I'm going to try make some more inverts maybe with rear rollers this time to test its abilities. I really do like the thought of a smallish 100cm gun that's easy to swing can be used for snapper snooping and smash a king when needed!

Thought I might give the guns a name so graphite (what carbon fiber is made from) was chosen seen in my custom epoxy curing cabinet much to the displeasure of my wife😄.

Posted By: e.m.p!
Date Posted: 30 Sep 2023 at 2:03pm
stunner! I really need to get back into the shed, your builds are an inspiration

Posted By: MadeYoung
Date Posted: 14 Dec 2023 at 10:52am
Back again with what some would call ridiculous but, I call it a inverted carbon roller with rear rollers, rolls off the tongue quite nice (pun intended). 

i have the full thread on" rel="nofollow -  

will post some highlights here, 

start with a computer model.
3d print some moulds 

mould some carbon skins 

add some reinforcements

make a handle 

smack it all together and boom inverted carbon roller with rear rollers 

Posted By: Spear_Sniper
Date Posted: 24 Jan 2024 at 8:07pm
After 20 years of making wooden guns of all known configurations, I decided to delve into knocking something up quickly in carbon.
More of a lego style assembly, than a true build, but fun all the same.

110cm invert roller, with ceramic muzzle rollers I turned up in the lathe, ball bearing blocks on the rubbers, 20mm primary rubber, and primeline 16mm rubber as the secondary. Both at 350% stretch.
Only using the 2 rubbers, as this is only pushing a 7mm spear.
Using a lightweight cuttlefish barrel, and MVD muzzle and handle. Will eventually drop some $$ and go with the double roller Ermes mech, which is a drop in replacement.

I'll fix up the overly long loops on the rubber to shackle connection when it comes time to re-do the rubbers next season.

This has already been tested on Warehou at close to full range when double wrapped, so does appear to have the goods. Hopefully will get to test this out on a thicker bodied fish :)

Posted By: MadeYoung
Date Posted: 29 Feb 2024 at 11:02am
Great build. Its quite amazing how all these big manufacturers are making modular components so builder can lego things together to make the setups they like! 

That cuttle barrel looks very cool any pics from the top to take a look at the shape?

Do you think when loading, the rubbers rub on the body making it harder to load?

Popped another out of the mould from previous post but made it a conventional setup. bit of a different finish gold foil in epoxy, may have gone slightly over board with the foil.

Posted By: Spear_Sniper
Date Posted: 14 Mar 2024 at 7:41pm
There is no noticeable rubber friction on the barrel. Probably the ceramic rollers for the muzzle and bearing blocks help a lot in that regard.
When the rubber is wet, it's pretty slick, so friction would be negligible anyway.

The Ermes trigger being a straight drop in was not completely true. I had to relieve the handle to allow full functionality of the line release, and to allow the sear to drop fully. But the mounting holes were all perfect.

And because I could not buy the ceramic bearing blocks I wanted, I just made some up. Something spearfishing related to do when the weather was horrible.

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