With a specialized tool, yes. On the left fitting in the picture, where the green o-ring is slightly visible, the white ring behind (to the left) of the o-ring, in front of the fitting, is actually part of the AC line that is pushed back to form that bulge.
Can't tell from the pictures, but those lines might also be slightly flared towards the open end as well, but I think that is to help keep the o-ring from falling off, thats all.