I have a Remington NPSS same barrel type and it appears to be removable with a allen wrench if you look close/ good lighting in the end of the barel you can see the hex shape, I have just recieved an email from Crosman which I had requested a exploded parts view. I just made the request late last night talk about fast service I'm impressed ! Anyway I am tooking to see what is build is, for possible modification, the nitro piston models boast 70% quieter but personally I dont think its that quite either, at least my Remington NPSS isn't, but then again I dont have alot to compare it to other than the Remington Vantage I had for a few days, prior to the NPSS,
I'm still too new to the airguns I dont have a good comparison I hope it gets quiter as it breaks in, I wanted the Trail NP XL, 95% of all the reviews I read were positive I loved the look and wanted a nice wooden stock, and the lower recoil nitro piston I was sold, right before I pressed the buy button reading one last detailed review which was mostly all positive the guy stated 2 dislikes were the origin of manufacturing US made vs China and the lousy trigger adjustablity using his ecxperinces with the Remi NPSS as a comparison, Well after reading all the post in GTA about trigger importnace I did a 360 and went with the Remi NPSS,
I would rather have a nice wood stock vs this composite but as that guy said the trigger on my is great, adjusted well, smooth in both stages, As to the made in the USA well it says that on the box..although on the owners manual it says Made in the USA with some foreing parts I find that shall we say in the grey area.like a Clinton version of the story, more truthful would be assembled in the USA
Hopefully as both our guns get broken in they will quieten down