Sig 556 Classic. Battle tested by the Swiss army. Only change is the American version runs on M16 mags. Standard rifle comes with a fold down rear sight along with the Sig red dot sight for $1550. The rifle in the picture come with the Sig rotary diopter rear sight. Much like the H&K rear sight for $1650.
We are throwing a free Sig green light laser with these classics while they last.