Unless you know what you are getting into don't take the side plate off. Use Gunscrubber and spray the insides good and you will get most all the gunk out of it.
Now if you just have to take the side plate off; take out the screws, hold it by the barrel with your right hand, tap the grip frame near the bottom of the side plate with a soft face hammer or screwdriver handle. The plate will come up. It is not stuck from age, it is fitted very tight. If you try to pry it out you will bugger it up and it will be hell to get back in place.
When the plate comes off parts will fall out. Have a manual handy.
Now if you just have to take the side plate off; take out the screws, hold it by the barrel with your right hand, tap the grip frame near the bottom of the side plate with a soft face hammer or screwdriver handle. The plate will come up. It is not stuck from age, it is fitted very tight. If you try to pry it out you will bugger it up and it will be hell to get back in place.
When the plate comes off parts will fall out. Have a manual handy.