You want a SIG and an AR rifle? Well here’s your chance. SIG can’t ignore the AR market and gun aficionados can’t ignore SIGs. They have come up with a direct gas impingement system AR variant. It’s called the M400 carbine. Chambered in 5.56×45 mm NATO of course. More details at the Daily Caller
The SIG Sauer M400 Direct Gas Impingement Carbine