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Just got an XDM OSP 10mm and am looking for to keep it as small as possible. Does the Holosun 507K fit or only the 507C? If so, what plate do I need? I am open to any other recommendations as well.


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Just got an XDM OSP 10mm and am looking for to keep it as small as possible. Does the Holosun 507K fit or only the 507C? If so, what plate do I need? I am open to any other recommendations as well.


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Congratulations on the purchase!

I just bought one too and have the same question.

Waiting for anyone to respond.

D


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The 507c has an exact RMR footprint. It appears from Holosun's website, that you need an adapter plate to go from the 507k to an RMR footprint, then if the OSP needs a seperate plate for the RMR (i haven't looked at the specs on the OSP in a while so I don't know of the slide is cut for RMR and uses plates to adapt everything else or not) you'd be stacked up with two adapter plates between the slide and the optic. If the OSP slide is already cut for the RMR, then you'll just have the 507k > adapter plate > slide setup.
 
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