[9x19]

If it's the factory hand guard (pic of mine), the rails for Nordic Components NC1/NC2 hand guards will fit.

Some here:
https://tufforce.com/mounting-parts/7-slots-side-bottom-rail-mount-for-ruger-sr22-hand-guard/

 

[9x19]

That's great!

I have some factory SRs, and some with Nordic aet-ups, they all share the same rails, so that's a plus. :bthumb: