I've done several MKII & 10/22 Extractor
Changes & came up with the idea to push the plunger in from the front with a paper clip & then with a small hook to pull the extractor
out of the slot.
I made the plunger pusher from a tiny drill bit that I have in a pin vise to get a good hold on it..
The Hook is a bent & cut paper clip, The plunger pusher could also be a small paper clip.
Another great tool for the Ruger pistol is a bobby pin to unlatch the mainspring housing.
Also after removing the extractor
clean the bolt & it's holes with solvent then a Q-Tip with some of the cotton removed so it fits the holes tightly.
You'll never get the chance to clean in here again so get it spotless & never use any lube of any kind..
The extractors plunger won't move to the rear far enough untill the firing pin stop pin is removed or moved to the left.
You might as well clean the Firing pin channel + the pin & return spring & it's holder while your in there..
I took these pics while putting a Volquartzen Exact Edge Extractor
in my MKII..
It was hard to hold the bolt, compress the plunger & pull the extractor
out while having a hand to work the camera too.
Hope this helps someone out..
MKII Extractor Removal & Instalation