A good start would be to read the owner's manual. If you do not have the owner's manual, go the the link below marked RAMLINE. It will take you to an on-line owner's manual for the Exactor pistol. Print and keep a copy.
Which one?
take apart the whole gun
Ask a gunsmith for help
Ask a gunsmith for help or ask the maker for a manual
Best left to a gunsmith
Take it to a gunsmith and ask for help
Can't be answered correctly without knowing who made it.
go to: forum.m1911.org and ask your question
You can get a manual at S&W's website for free.
Look in the owner's manual. You can get one for free from S&W.
I lost owner's manual You need to check the owner's manual.
On the left side of the safety switch there is a pin that blends into the pistol pretty well. take that pin out and the gun should come apart.