chicharrones
needs more ammo
Just as I was posting this, Hammerli added a "Force B1" rifle, which has a removable barrel.
UPDATE: It's not quite what I want, because the handguard is not removable and makes one of the quasi-takedown parts too long. But B1 is an interesting product nonetheless.
Cut the forend back like a Marlin Papoose? Or, cut the forend section and figure out how to bolt it to the barrel?
One thing that has my curiosity up is if a barrel detaches like a pneumatic quick disconnect, how does the barrel lock in solid?