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Little Big Pistol Build |
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Billbobnz 
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Joined: 14 Jun 2020 Location: Ashburton Status: Offline Posts: 941 |
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 Posted: 09 Jul 2026 at 10:10pm |
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You should video the whole build and do a youtube channel!
Love this! |
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BC_Clark
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Joined: 16 Feb 2024 Location: Auckland Status: Offline Posts: 30 |
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Posted: 13 Jul 2026 at 9:14pm |
Sometimes think about it. Or alternative ways of publishing.
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BC_Clark
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Joined: 16 Feb 2024 Location: Auckland Status: Offline Posts: 30 |
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Posted: 13 Jul 2026 at 9:21pm |
   Now all finished externally with stone grips. Only the valve components left to make.
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jwabfrog
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Joined: 13 Nov 2021 Location: Thames Status: Offline Posts: 178 |
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Posted: 14 Jul 2026 at 9:49am |
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That looks super professional. Compliments to you! Bead blast finish?
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 3065 |
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Posted: 14 Jul 2026 at 10:04am |
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How does that trigger system work?
From what i can work out, its in the fired postion.amd when you cock it it lifts the sear up onto the bit sticking up next to the spring and trigger sides backwards as opposed to having a pivot point. |
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J-S
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Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 519 |
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Posted: 14 Jul 2026 at 11:06am |
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looks bloody cool
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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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jwabfrog
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Joined: 13 Nov 2021 Location: Thames Status: Offline Posts: 178 |
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Posted: 14 Jul 2026 at 5:35pm |
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Please also post some videos or youtube links showing it being fired once you've got the valve done
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vault
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Joined: 27 Apr 2026 Location: Dunedin Status: Offline Posts: 128 |
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Posted: 14 Jul 2026 at 10:14pm |
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Any chance of a photo look down the sights, i like a thin front sight on a pistol. BIG QUESTION... How Much ? 😎
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BC_Clark
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Posted: 15 Jul 2026 at 8:31pm |
Yes bead blasted. Requires preparation to keep the beads out and thoroughly cleaning any that make it inside.
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BC_Clark
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Posted: 15 Jul 2026 at 8:39pm |
Yes that is how it works. The two lower legs of the trigger can be drilled and tapped with a travel stop screw on the forward leg and a ball plunger screw (2-stage feel) on the rear leg, allowing it to be highly adjustable with a short break. But with the addition of the safety lever I have left this out to make the safety safer. The trigger is nice enough as it is.
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BC_Clark
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Posted: 15 Jul 2026 at 8:48pm |
Here you go. I have not yet added up the costs for this but the stone grips added a significant amount.  |
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 3065 |
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Posted: 15 Jul 2026 at 9:15pm |
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Is there any particular advantage to the trigger system ? Does it get used in other firearms or is it something you've designed. I've nit come across it before.
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BC_Clark
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Posted: 16 Jul 2026 at 8:37pm |
Which part? As a whole its advantage is doing the job efficiently and effectively. I have not seen this combination used before but each of the elements have been around. e.g. the drop sear or falling sear is more common in rifles or higher end pistols or in extreme modification of Crosman 22xx grip frames. In pistols like the 22xx the geometry does not readily suit a drop sear so usually an intermediate lever needs to be added. This introduces more complication room for play. Although a well-positioned intermediate lever can get the triggering force to nearly nothing. Not using a drop sear, like the standard Crosman 22xx, usually gives a more creepy trigger break as you are un-wedging it from the striker against the full force of the spring. |
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kruzaroad
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Posted: 16 Jul 2026 at 9:13pm |
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Cheers for that. Its a hell of an interesting concept.
Especially as i wasn't aware of it. One more set of questions or assumptions... Im assuming the two faces literally have a thin layer of grease/ mso2 that the falling sear rests on. Working much like the theory of a tyre aqua planning on water, giving zero friction to that part How quickly do you estimate the corners of the falling part to round and lose the crispness of the 90° corner. Will rounded corners then slip a tad earlier and the drop become a smoother slip than drop. How pratical/or how much more pressure would it, in your view, exert if it was holding back a piston and main spring? Or is it that its only holding the hammer and it's light spring back that makes it viable. |
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BC_Clark
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Posted: 44 minutes ago at 6:26pm |
I use Singer sewing machine oil. I was given a miniature replica 1911 that you can cycle by hand but it wasn't feeding reliably. So I got Singer oil due to their connection with the highest quality 1911's. It worked flawlessly after applying the oil. But any oil on steel polished to 1000# will be good. Aquaplaning or dynamic fluid bearings need more velocity and time to establish separation. But there will be some of this effect at a microscopic level when stationary. Using a wide sear lowers the stresses on the edges. Mine is 8mm wide with machined square faces whereas a Crosman 22xx sear is something like 3mm, with a rough punched edge, engaging with a round edge of the striker - making the contact very small and the contact pressure high. I don't see it wearing enough to change the function in my lifetime. That leads me to remember another advantage of a drop sear: you can have lots of sear engagement with the striker without making the trigger pull heavier, longer, or more creepy. You can have say 2mm of engagement with a drop sear making it very safe. Whereas with a standard Crosman 22xx, people reduce the engagement to nearly nothing to get a light and short trigger pull. Like 0.1mm of engagement might feel nice but it's on the verge of firing from being bumped. And if parts wear it gets closer to letting go. I actually have used a similar trigger-sear system for a spring piston airgun but it was a Nerf sniper rifle. It had a fairly strong mainspring but not on par with real airguns. The trigger was light for what it was holding back. |
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Billbobnz wrote: