The firearm must be unloaded and uncocked (fired).
Remove the magazine.
Use a small, blunt object to push the take down button, located at the rear of the slide, into the slide until it stops (about 1/8 inch); keep it pushed in and lift the slide up until it stops.
Release the take down button carefully as the spring is under pressure.
Hold the rear of the slide up gently and push the slide forward off the firearm.
This is as far as you need to go for cleaning one of these "fine" firearms.
That is not a question.
Take it to a gunsmith
25-50 USD
how do you disassemble a model 49 ithaca 22 rifle
The one that came with it
Best thing to do is find a gunsmith
Which model??
No published sn data.
Best thing to do is find a gunsmith
Best left to a gunsmith
Watch this video.
Best left to a gunsmith