I agree with NGCSUGrad09
I will add that I was able to obtain a mil-spec 5.5-22 for my Mk13 Mod0 build and it came for an ex-operator. This was the most difficult piece to source for my build.
I have a NF 5.5-22 (non mil-spec) that does not have HS turrets, does have zero stop, is 1/4 moa, but does have a NPR1 reticle. You would need the same scope but with a mildot reticle and zero stop for a mod0.
Also, if you are working on a Mod0, the Mk13 Mod 0's did not leave the CRANE with Nightforce on them, they left with MK4 10x scopes. They were changed in the wild.
I have never seen a NAV-spec, but I have seen a couple of ARMY-spec and MIL-spec pop up in the PX here on the hide Most/all have been the 3-15x50.
Best of luck on your hunt.