Re: Which Sig AR is better?
I don't mean to throw a wrench in your plans if you are only sold on buying Sig... if you are into it more for the piston driven quality you may want to take a look at Rock River's PDS..
upper rail is completely monolithic-
I don't have any issues with Sig, just something to think about.
If you like the idea of maintaining a traditional AR, Stag's model is pretty affordable and will still be able to swap somet parts from your other AR platforms.
As far as I'm concerned, the quality of much of RR's work is a great value for what you're spending.
Sorry to post off topic, just thought I would throw in a different idea in the event you haven't already considered it...
Good luck to you