Or just install the SRT and grips yourself and save a chunk of money by not paying Sigs ridiculous prices.
Winner winner chicken dinner.
-The right to be left alone is the most comprehensive of rights, and the right most valued by free people.-Louis Brandeis
-Its a tool box... I don't care you put the tools in for the job that's all... -Sam from Ronin
-It is the mark of an educated mind to be able to entertain a thought without accepting it. -Aristotle