As far as I'm aware the ejector plunger is the same across the basic bolt face sizes. I recall something about some caliber-specific variations with the ejector, but for the random average off the shelf M700's the ejector is samey samey. Remove it, open the bolt face and reinstall.
The extractor is where it gets funky - most people go for the mini-16 type extractor as it is more stable than the smaller/shorter Sako-type extractor.
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