NoAdmiration
Marksman
The Nitron Model is the MK25 super secret squirrel finish. I will say that my older Sigs did get surface rust if they were not stored properly, so it might be worth the upgrade if you think that will be a problem. As I recall the SRT is standard on the E2s. You can add it later if you like, it's a simple parts swap, but Sig was reluctant to sell me the parts directly. I eventually convinced them so my P245 did have the SRT even though it was never and option for that model.