I just wanted to say that I recently purchased a SIG556 Holo, and yeah the Holo sight was pretty much a joke and the BUIS are pretty lame also. But I threw an EOTech on mine and it is in fact the best operating and shooting semi auto 556 i have put my hands on. I have experienced the colt M4gery and the real Colt M4 and M16, the Bushmaster, LMT, RRA, the ruger Mini 14 and the list goes on and on. I am saying this because there are not enough posts on here praising this bad a** machine. I have put close to 1000 rounds through this weapon and only had one double feed and I think that was because of the Sig mag. I just want people that are looking at this site to know that the Sig is not riddled with issues, (one may make that assumption by reading the many posts). So here is a tall icy cold one in the air to the Sig from me, it is in fact one of my best purchases ever, in line just behind my dog and my truck.