Hello 
I hope all are doing well.
I own both a Hatsan .25 Flashpup in wood and a Flash synthetic in .22.
The Flash .22 is modded,
Flash mods:
Exhaust valve seat enlarged
Exhaust valve port enlarged to .2"
Transfer port enlarged to .2"
Barrel port enlarge to .155"
Huma Regulator set to 110 psi
Hammer weight reduced by 8 grams
Hammer spring out 1 turn
Shot count: 32
Spread 23 FPS
STD Dev: 5 FPS
Average: 880 FPS JSB Hades 15.89 grain
*I'm still tuning these JSB Hades
*Some o-rings require replacement due to taking the gun apart so many times during tuning
The Flashpup .25 is in original form.
???Questions???
1. Are the actions of both guns the same since they carry the same part number? Meaning, are they swappable between guns?
2. Would a stock flash action in .22 have the same size transfer port as a stock flashpup in .25?
3. Would I be able to swap chassis between these two guns? As in, swap modified parts (barrel, action, exhaust valve) from the flash to the Flashpup, making the Flash .25 and Flashpup .22?
I'm just trying to see if anyone out these knows these answers before I tear my Flashpup apart and begin modding.
Thanks!

I hope all are doing well.
I own both a Hatsan .25 Flashpup in wood and a Flash synthetic in .22.
The Flash .22 is modded,
Flash mods:
Exhaust valve seat enlarged
Exhaust valve port enlarged to .2"
Transfer port enlarged to .2"
Barrel port enlarge to .155"
Huma Regulator set to 110 psi
Hammer weight reduced by 8 grams
Hammer spring out 1 turn
Shot count: 32
Spread 23 FPS
STD Dev: 5 FPS
Average: 880 FPS JSB Hades 15.89 grain
*I'm still tuning these JSB Hades
*Some o-rings require replacement due to taking the gun apart so many times during tuning
The Flashpup .25 is in original form.
???Questions???
1. Are the actions of both guns the same since they carry the same part number? Meaning, are they swappable between guns?
2. Would a stock flash action in .22 have the same size transfer port as a stock flashpup in .25?
3. Would I be able to swap chassis between these two guns? As in, swap modified parts (barrel, action, exhaust valve) from the flash to the Flashpup, making the Flash .25 and Flashpup .22?
I'm just trying to see if anyone out these knows these answers before I tear my Flashpup apart and begin modding.
Thanks!
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