I have both and always thought the Sig was a better/more dependable gun until the last couple of range trips. The Walther/Colt shoots more brands ammo then the Sig. I also like the WC does not have a magazine disconnect.
Yes. Same gun.Isn’t the sig the same as the GSG? I used to own one, but after spending too much to get it threaded it wasn’t accurate with a can. Most folks have a better experience with them than I did.
Yes. Same gun.
All the ones I’ve seen cams with a removable thread protector that allowed you to attach an adapter with 1/2-28 threads. Simple swap and not much $$. But maybe they do sell CA complaint models as well.
@JimB Yes the Sig and GSG are the same but the Walther/Colt is different. I am leaning more toward the Walther/Colt when the can is involved.