I like that NP3 coating they have, does their ambi bolt release work well, I always wondered how tough that thing was to get to release with the trigger finger.
Had a friend who had one, (sig 556, that is) let me shoot it once in a while. I fell in love with the thing! Two things to note though: Its maybe a pound or two heavier than your average AR of the same size, and the front is a bit heavier thanks to the piston. I actually liked it being front heavy, it felt more stable when shooting from a sitting or prone position. That, and the thing was smack-dab bulls-eye accurate every shot at 200 yards, so the only thing you really have to worry about is user-error.
Love my 556 - added eotech 5112 and 3x magnifier - couldn't be happier
I've owned both the AR and the 556. Love the Sig! The trigger is awesome. Yeah, it weighs a bit more, but the time I save cleaning the weapon more than makes up for it (piston rod system). The only knock on the Sig that I can think of is that the ejected brass dings up the rear of the ejection port.
Oh yeah, you can't co-witness with an EOtech using the stock BUIS.
I wasn't terribly impressed with the trigger in the one I've shot. Creepy...
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