Thanks for the amazing write up!
I also have a Trail NP and am searching for ways to decrease its total sound output. I do notice that the Nitro Piston spring action produces the majority of the noise, not the muzzle blast.
Do you think adding cotton/soft-paper into that small volume between the shroud and the barrel will help silence the weapon? My idea is that such soft materials could help dampen the compressed gas flowing into the shroud.
BTW, did you add any "exhaust" holes at the breech end of the shroud to relieve the pressured air flow?
- Very interested!
