Best to ask a gunsmith for help if you don't have a manual
You can read or download a manual at http://stevespages.com/pdf/remington_572.pdf or you can go to Remington.com and request one.
triplek.com
Check the discussion page and do what is written backwards. If you have trouble, you need to see a gunsmith
100-300 or so
You need a gunsmith
You can get a manual for free at Ruger's website.
Best left to a gunsmith
how do you disassemble a model 49 ithaca 22 rifle
Remove magazine,cock and lock it,then firmly hold the firing pin section,turn it clockwise and full with care,then unlock the slide carefully,done
Best to let a gunsmith show you how.
Best to ask a gunsmith for help
Ask a gunsmith for help