[Willard]

My best "guess" would be "possible" from example I found that appears to be a P226R, with what appears to be a correct Sig Serial Number. My experience with simunitions was in mid 90s, with 9mm conversions. I think I would call Sig CS, and inquire as to the possible serviceability, before attempting a "reverse" conversion, as the simunitions don't put as much of a "load" on the frame as a centerfire cartridge.

 

[deadmanmike]

I'm pretty sure that the locking inserts may be different on the dedicated sims guns

 

[Tigers1363]

According to Sig, these cannot be converted to 9mm. The CS rep told me that the frames were made differently for the factory blue guns.

Without detail stripping it, I couldn't see a big difference, the slide does appear to be milled out though.