Nikon FMN2 + (OM fit) Sirius 70mm-210mm compatability?

Hi Guys, I realise this is a budget lens but is the Sirius (OM fit) 70mm-210mm compatible with the FM2n?
Thank you.

as long as it is a Nikon F mount,, why not? Korean lens aftermarket, usually fairly decent.

If the "OM" is referring to Olympus OM mount, then no, it is not compatible. It would have to be Nikon F mount, as has already been pointed out.