Kiwi Airgunners Forum : .25 CO2 beast www.kiwiairgunners.co.nz/ This is an XML content feed of; Kiwi Airgunners Forum : Pauly's Technical Area : .25 CO2 beast Copyright (c) 2006-2012 Web Wiz Forums - All Rights Reserved. Mon, 27 Jul 2026 06:40:24 +0000 Sun, 21 Jun 2026 20:01:08 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 10.14 360 www.kiwiairgunners.co.nz/RSS_post_feed.asp?TID=1341 Kiwi Airgunners Forum www.kiwiairgunners.co.nz/forum_images/logo.jpg www.kiwiairgunners.co.nz/ .25 CO2 beast : Gotcha. The valve is off set from... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14753&title=25-co2-beast#14753 Author: kruzaroad
Subject: 1341
Posted: 21 Jun 2026 at 8:01pm

Gotcha. The valve is off set from the center.
Which i assume is part of the reason it has a central guide. To stop the hammer tilting as it hits. Cheers]]> Sun, 21 Jun 2026 20:01:08 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14753&title=25-co2-beast#14753 .25 CO2 beast : So the shaft screws into the housing... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14752&title=25-co2-beast#14752 Author: nunga
Subject: 1341
Posted: 21 Jun 2026 at 7:40pm

So the shaft screws into the housing just above the valve. the hammer slides down the shaft and hits the Valve







Edited by nunga - 21 Jun 2026 at 7:41pm]]> Sun, 21 Jun 2026 19:40:34 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14752&title=25-co2-beast#14752 .25 CO2 beast : How does actuate the valve? Being... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14750&title=25-co2-beast#14750 Author: kruzaroad
Subject: 1341
Posted: 21 Jun 2026 at 6:47pm

How does actuate the valve?
Being that shaft is screwed into the valve and im assuming doesn't move, and hammer is hollow in the middle to slide down the shaft, im at a bit of loss as to where the hammer contacts on the valve set up to cause the pushing motion to open the valve.
Im looking at it from limited understanding and basing it off a 1322 valve which strikes a central pin pushing the valve open.
What am missing/ not seeing in your design?
Love the pics with lathe in motion. Brings back memories from yesteryear.
Very envious of you guys who set up a permanent base and set up with the tools to make use metal.👍
]]> Sun, 21 Jun 2026 18:47:20 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14750&title=25-co2-beast#14750 .25 CO2 beast : So i had some time today to get... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14748&title=25-co2-beast#14748 Author: nunga
Subject: 1341
Posted: 21 Jun 2026 at 4:55pm

So i had some time today to get some more machining done.

I made the adjustable hammer. Everything is 316 Stainless.

My setup is going to be a threaded shaft which screws into the back of the value body which will stick out the back of the gun. the piston (hammer) has a hole in it to slide along the shaft to guide to to the valve. I made a custom threaded adjustment knob..  i just wind the knob in for more power of back it off for less. this will be sticking out the back of the gun as well.





















]]> Sun, 21 Jun 2026 16:55:11 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14748&title=25-co2-beast#14748 .25 CO2 beast : J-S wrote: BC_Clark wrote:I... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14711&title=25-co2-beast#14711 Author: BC_Clark
Subject: 1341
Posted: 17 Jun 2026 at 10:09pm

Originally posted by J-S J-S wrote:

Originally posted by BC_Clark BC_Clark wrote:

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.

You should share some of your builds here!


I can't show this one due to NDA. That's the annoying thing, can't show the most interesting ones.
]]> Wed, 17 Jun 2026 22:09:32 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14711&title=25-co2-beast#14711 .25 CO2 beast : amazing engineering skills but... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14672&title=25-co2-beast#14672 Author: vault
Subject: 1341
Posted: 15 Jun 2026 at 8:49pm

amazing engineering skills but not a fan of c02 in otago, gets to cold and then it's useless]]> Mon, 15 Jun 2026 20:49:36 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14672&title=25-co2-beast#14672 .25 CO2 beast : Keen to see how this turns out,... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14668&title=25-co2-beast#14668 Author: Mintie
Subject: 1341
Posted: 14 Jun 2026 at 3:17pm

Keen to see how this turns out, ive done a few .25 CO2 builds over the years but only with standard sized valves that I have hogged out for more volume, will be interesting to see what sort of power you can get out of a full custom valve!

From memory one of the Crosman builds I called the 2540 got about 16 fpe from a 10" barrel, and the 25cal CR600 i built for Zooboy got about 22fpe from a 20" barrel. Both of those just ran on 12gr cartridges. ]]> Sun, 14 Jun 2026 15:17:06 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14668&title=25-co2-beast#14668 .25 CO2 beast : Nunga, the big question is does... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14665&title=25-co2-beast#14665 Author: RangerPete
Subject: 1341
Posted: 14 Jun 2026 at 2:44pm

Nunga, the big question is does your new trigger SMELL like beer???]]> Sun, 14 Jun 2026 14:44:16 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14665&title=25-co2-beast#14665 .25 CO2 beast : BC_Clark wrote:I love seeing... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14657&title=25-co2-beast#14657 Author: J-S
Subject: 1341
Posted: 12 Jun 2026 at 10:14am

Originally posted by BC_Clark BC_Clark wrote:

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.

You should share some of your builds here!
]]> Fri, 12 Jun 2026 10:14:28 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14657&title=25-co2-beast#14657 .25 CO2 beast : Speaking of mods. Has anyone ever... www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14656&title=25-co2-beast#14656 Author: metallicsting
Subject: 1341
Posted: 12 Jun 2026 at 7:27am

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]]> Fri, 12 Jun 2026 07:27:00 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=1341&PID=14656&title=25-co2-beast#14656