Tuning The “Thunderbird” flys. …. My last big gun build. I

A.G.R

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Jul 27, 2022
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This is the second of two rifles I designed 16 years ago. I built one already. It’s known as the ”Firefox”. Some have seen it posted a few times here.
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It was designed for hunting bigger game and at the time to see if I could. It does a solid 32 ft lbs .. it’s a carbine shrouded LW .25 barrel with custom piston and machined rear trigger block as well as cocking arm.


After hem hawing ,I decided to assemble the other one. It’s a bear to make these as they are parts from a Webley Patriot and a Uk Tommy trigger. Both valueable guns in their own right. .. Because of that , a custom piston as well as rear block had to be machined as they never made these guns in 30 mm tubes. A Uk Tommy is 27 mm , custom sears and the tube of a Patriot lengthened to acomidate the Tommy trigger and block.
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I present to you the second generation of the “Firefox” build. The ”Thunderbird”.
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This gun is a bit different as I’ve learned a few things since the original build.. it’s still a 32 ft lb hammer but I did things a tad internally different on the spring ,piston, port, and barrel.. The stock is wiped with spirits to show future grain when finished. As I stated I will not be building any more hammers like these as , 1. I can’t get triggers , 2. I’ve built smaller prototypes that are easier to cock and shoot daily..3. There is no market for something like this as cost would be like a expensive fire arm. BUT BOY ARE THEY FUN TO HUNT WITH…poop DONT RUN AWAY.

I will be lengthening the shroud 2 more inches to aid in cocking and for looks.. These were parts from the same design I made 16 years ago..

This bird hits hard at 32 ft lbs. 25.3 Jsb kings @750 it will launch 20 grain domes at 875 for 34 ft lbs but it’s not as friendly
Its a long time coming and I really did not plan on doing this one as the “Firefox” is so good. But Alas. I feel content knowing my original plan was completed, even if it was 16 years later. I still have a lot of soft labor prepping metal for bluing and finishing the stock
I may even consider engraving it
 
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This is the second of two rifles I designed 16 years ago. I built one already. It’s known as the ”Firefox”. Some have seen it posted a few times here. View attachment 414701It was designed for hunting bigger game and at the time to see if I could. It does a solid 32 ft lbs .. it’s a carbine shrouded LW .25 barrel with custom piston and machined rear trigger block as well as cocking arm.


After hem hawing ,I decided to assemble the other one. It’s a bear to make these as they are parts from a Webley Patriot and a Uk Tommy trigger. Both valueable guns in their own right. .. Because of that , a custom piston as well as rear block had to be machined as they never made these guns in 30 mm tubes. A Uk Tommy is 27 mm , custom sears and the tube of a Patriot lengthened to acomidate the Tommy trigger and block. View attachment 414708View attachment 414709View attachment 414710View attachment 414712
View attachment 414725

I present to you the second generation of the “Firefox” build. The ”Thunderbird”.
View attachment 414715View attachment 414717View attachment 414718View attachment 414716

This gun is a bit different as I’ve learned a few things since the original build.. it’s still a 32 ft lb hammer but I did things a tad internally different on the spring ,piston, port, and barrel.. The stock is wiped with spirits to show future grain when finished. As I stated I will not be building any more hammers like these as , 1. I can’t get triggers , 2. I’ve built smaller prototypes that are easier to cock and shoot daily..3. There is no market for something like this as cost would be like a expensive fire arm. BUT BOY ARE THEY FUN TO HUNT WITH…poop DONT RUN AWAY.

I will be lengthening the shroud 2 more inches to aid in cocking and for looks.. These were parts from the same design I made 16 years ago..

This bird hits hard at 32 ft lbs. 25.3 Jsb kings @750 it will launch 20 grain domes at 875 for 34 ft lbs but it’s not as friendly
Its a long time coming and I really did not plan on doing this one as the “Firefox” is so good. But Alas. I feel content knowing my original plan was completed, even if it was 16 years later. I still have a lot of soft labor prepping metal for bluing and finishing the stock
I may even consider engraving it
That's an interesting build, what kind of grouping will it hold, at say, 30yards?
 
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This is the second of two rifles I designed 16 years ago. I built one already. It’s known as the ”Firefox”. Some have seen it posted a few times here. View attachment 414701It was designed for hunting bigger game and at the time to see if I could. It does a solid 32 ft lbs .. it’s a carbine shrouded LW .25 barrel with custom piston and machined rear trigger block as well as cocking arm.


After hem hawing ,I decided to assemble the other one. It’s a bear to make these as they are parts from a Webley Patriot and a Uk Tommy trigger. Both valueable guns in their own right. .. Because of that , a custom piston as well as rear block had to be machined as they never made these guns in 30 mm tubes. A Uk Tommy is 27 mm , custom sears and the tube of a Patriot lengthened to acomidate the Tommy trigger and block. View attachment 414708View attachment 414709View attachment 414710View attachment 414712
View attachment 414725

I present to you the second generation of the “Firefox” build. The ”Thunderbird”.
View attachment 414715View attachment 414717View attachment 414718View attachment 414716

This gun is a bit different as I’ve learned a few things since the original build.. it’s still a 32 ft lb hammer but I did things a tad internally different on the spring ,piston, port, and barrel.. The stock is wiped with spirits to show future grain when finished. As I stated I will not be building any more hammers like these as , 1. I can’t get triggers , 2. I’ve built smaller prototypes that are easier to cock and shoot daily..3. There is no market for something like this as cost would be like a expensive fire arm. BUT BOY ARE THEY FUN TO HUNT WITH…poop DONT RUN AWAY.

I will be lengthening the shroud 2 more inches to aid in cocking and for looks.. These were parts from the same design I made 16 years ago..

This bird hits hard at 32 ft lbs. 25.3 Jsb kings @750 it will launch 20 grain domes at 875 for 34 ft lbs but it’s not as friendly
Its a long time coming and I really did not plan on doing this one as the “Firefox” is so good. But Alas. I feel content knowing my original plan was completed, even if it was 16 years later. I still have a lot of soft labor prepping metal for bluing and finishing the stock
I may even consider engraving it
Absolutely beautiful work there. Out of curiosity what do you expect your price point would be on a custom build like that? I imagine you have a ton on man hours into it.
 
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Absolutely beautiful work there. Out of curiosity what do you expect your price point would be on a custom build like that? I imagine you have a ton on man hours into it.
Well it’s a one off as parts are NLA ..
BUT I HAVE A BLUEPRINTED gun that uses a CD OR Rekord trigger 15 to 24 ft lbs depending on build specs.

Custom built guns are not cheap , let alone the cost of the wood blank. Let’s just say Venom charged close to a grand in 1987 for hand built bespoke guns ,the Mach1 , and more for the Mach 2 , with inflation $900 then would be around $2400 today
I would not expect less than .010% of the market is for this type of weapon.. I could be wrong ..
 
Well it’s a one off as parts are NLA ..
BUT I HAVE A BLUEPRINTED gun that uses a CD OR Rekord trigger 15 to 24 ft lbs depending on build specs.

Custom built guns are not cheap , let alone the cost of the wood blank. Let’s just say Venom charged close to a grand in 1987 for hand built bespoke guns ,the Mach1 , and more for the Mach 2 , with inflation $900 then would be around $2400 today
I would not expect less than .010% of the market is for this type of weapon.. I could be wrong ..
I think you should follow your dreams man. $2400 is definitely a bit on the steep side but people are paying $1500 for the new TX200 at Pyramydair and I personally don't think thats nearly as cool as your build. I would think you would probably be able to sell quite a few especially if you could figure out how to keep them under $2k.
 
Stunning rifles. What is the estimated cocking effort?
We’ll , it’s not a R7. .. because it’s a long stroke it’s balanced and does not load at the end .. It uses wire thinner than the R1 factory spring.. .148 is stock R1/hw80 .. I’d say like a Hw 90. In this one I’m testing gas rams , In airguns there is a fine balance of weight spring and port size and more so length.
 
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Thanks for the responses.. This really has been a long time coming and during what I learned building smaller rifles ,I was able to implement into this.
What makes a gun like this so fun Is I’ve already done 95% of the hard math and easy science, years back.

I will repost when finalized. I’m not sure if it’s GONA be gloss bluing, satin or ……


side note .. has anyone priced true metal engraving. let’s say more than a Tx or pro sport to start out..
 
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