AR15 or Sig556

[JustSomeDude]

I posted in the New Member thread expressing my interest in the AR format. However, after some more reading, I've been greatly interested in the Sig556. Has anyone here shot one? Can you compare to the AR? And if you have to choose one over the other, which one would you take, and why?

[ssf467]

I posted in the New Member thread expressing my interest in the AR format. However, after some more reading, I've been greatly interested in the Sig556. Has anyone here shot one? Can you compare to the AR? And if you have to choose one over the other, which one would you take, and why?

AR15 piston driven

[Hoser]

AR. Gas or piston. No matter unless you are running a can.

[Daniel187]

AR-15. the Sig is nice but I can't mount a 203 on it. I think

[Gman]

AR. Parts and accessories are ubiquitous.

[car-15]

i'm going to go against the grain here, I have 8 ar's and 1 556 but I do prefer the 556 sometimes, reason being it runs cooler, and has to be cleaned less often, and is much easier, and the piston system is by design more reliable, but the ar is lighter, and a lot cheaper.

[cowboykjohnson]

would like a 556, but cant justify 1500 for a piston AR, when i can go way cheaper for an equally good gun.