No actually they’re not WB. That is one scarce PPW. No doubt one could acquire p230 but the price…eek.
Are they suppressable ? Or just really accurate.

It’s a Sig,, it ain’t gonna be cheap.
Suppressable? Yes by either threading on or sweating on an extension of the original barrel.
Or swapping out the barrel.
One can also inside thread the barrel, but there aren’t many smiths I’d trust to do the work. C”.
Fixed barrel, gonna be accurate.