If you are thinking about buying a can then somehow pinning it to the muzzle that isn't integrally suppressed. What that is...is an idea you might want to rethink.
To answer your original question. There is no aftermarket barrel for the 1522 that I have heard about. Shortening the barrel is something that is regularly done. One of our Forum members, Belt_Fed, can do and as well as a host of other companies. Of course to permanently attach a can to the muzzle would require the upper too because once that can is on the muzzle that's it, your upper reciever is also permanently attached at that point. I'd rethink it.
Not true. The suppressor I am wanting to attach is small enough to slide the barrel but over it to attach/detach the handguard and barrel from the upper receiver. The barrel shroud I have on now (fake can) is larger than the suppressor I am buying and it isn't removed to pull the handguard. Granted, the barrel nut doesn't slide over it, but the handguard, once detached from the barrel nut, will slide off... allowing for the barrel nut to be removed (just slid up the barrel) as well as the barrel to be removed from the receiver. The Tacticool22 adapter stays with the receiver. The supressor I am getting is just shy of the same diameter of the flash hider... Again, which doesn't have to be removed to pull the handguard.
Maybe I should explain it again with the knowledge that the stock OEM handguard is not on the weapon and will no longer be used.
I want to cut the barrel down to affix a suppressor to the end. Thereby extending a shortened barrel back to 16" (including the suppressor). To avoid registering the weapon as an SBR, the can must be permanently attached, or a shroud should be attached permanently that would allow for a suppressor to be inserted when needed (the shroud would be the extension of the barrel).
I've seen it done similarly on .223s, 10/22s, etc. I'm looking at the Advanced Armament PILOT.
Also, I am hearing that it is about to become harder to get a suppressor because the "get your local sheriff to sign off on it" is going to become mandatory. When it does, at least in Louisiana, they are anticipating the ability to actually GET a suppressor will be next to impossible.
The only reason I can see not to permanently attach the suppressor is so that I could use it on my Walther P22.
Actually... all I really want is for the suppressor to recess inside the handguard. Right now the handguard is 11.8"... the factory OEM handguard is 10". Either way, if I add the suppressor, it will be on the tip of the barrel protruding from the tip of the handguard.