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.25 CO2 beast |
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nunga 
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Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1125 |
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 Posted: 25 May 2026 at 8:44pm |
To get 30FPE it will take approximately 2.2 grams of CO2 per shot with the 120cc tank i will have screwed to the Sodastream bottle, so the math says 182 of usable shots. So i can safely say 150 shots per tank.
Edited by nunga - 25 May 2026 at 8:46pm |
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2nd place HP springer - WFTF World Championships 2014
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 3023 |
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Posted: 25 May 2026 at 9:52pm |
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Plenty for a evenings hunting. Goat/wallaby hunting at that.
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BC_Clark
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Joined: 16 Feb 2024 Location: Auckland Status: Offline Posts: 10 |
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Posted: 29 May 2026 at 10:07pm |
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I love seeing custom builds. Following this build with interest. CO2 is well capable of 30 ft-lbs in .25 and it may use less gas than expected. e.g. I got 26 ft-lbs in .35 from a 6" barrel and it used 1.1 grams per shot. |
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nunga
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Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1125 |
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Posted: 10 Jun 2026 at 8:58pm |
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So it has been a little while since ive done anything. I have made the trigger now and will start on the rest of the trigger over the next couple of weeks.     |
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2nd place HP springer - WFTF World Championships 2014
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Pauly5
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Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1745 |
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Posted: Yesterday at 8:13am |
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A true custom trigger. Good stuff!
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Myson
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Joined: 07 Mar 2016 Location: Feilding Status: Offline Posts: 264 |
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Posted: Yesterday at 11:20am |
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You guys continually amaze me!!!
 I wish I had your skills, knowledge and creativity.... sheer brilliance before me and other readers here!!! Well done! In my next life I'm going to study engineering!!!!!!
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https://www.youtube.com/watch?v=eq7jVyBfFqE
Air Arms S510 US .22 Air Arms S410 .22 Weihrauch HW97KT .177 Weihrauch HW95 .177 |
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Pauly5
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Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1745 |
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Posted: Yesterday at 11:22am |
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You could buy yourself a benchtop lathe. That'd open up another slippery slide to fall into. :)
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jwabfrog
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Joined: 13 Nov 2021 Location: Thames Status: Offline Posts: 175 |
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Posted: 22 hours 29 minutes ago at 1:31pm |
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Lost wax cast? Very cool! What metal for the trigger?
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nunga
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Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1125 |
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Posted: 21 hours 14 minutes ago at 2:46pm |
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Trigger is made from recycled beer cans. I melt them down in my big furnace into ingots. That is a leftover bit from my melt. So the trigger is made of beer!
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2nd place HP springer - WFTF World Championships 2014
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metallicsting
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Joined: 15 Aug 2025 Location: Wellington Status: Offline Posts: 32 |
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Posted: 4 hours 33 minutes ago at 7:27am |
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Speaking of mods. Has anyone ever tried one of these in a co2 gun? Just wondering if it would actually work if I was to buy a co2 gun and use this instead of buying the disposable ones.
I just found this on AliExpress: | Outdoor Inflation Reusable gas Tank Tire Inflator Stainless Steel Mini Pump 8/12/16g Co2 Cartridge MTB Bicycle Bike Accessories https://a.aliexpress.com/_mtqUWl9 |
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FX Impact M4 .22 Cal
Ruger 22LR |
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J-S
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Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 510 |
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Posted: 59 minutes ago at 10:14am |
You should share some of your builds here!
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J S Airguns
Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many.. |
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-Ec wrote: