Single Six grip frame

[Acorn]

I have a SS Single Six on layaway. It was made in 2000 per Rugers site. I don’t have the gun to measure using Cary’s chart. I am looking to order replacements, either OE or aftermarket but I’m unsure which grip frame I have. Anyone know or do I have to wait to get my new pride and joy to see?

 

[Fox Mike]

XR3-RED unless it is a birdshead.

 

[Acorn]

Thank You!