SIG USA is a big bowl of fail
I will have to disagree. SIG USA makes a great pistol line and the standard SIG556 is a great rifle. I built an AR with all top tier parts chambered in 7.62 x 39 and it was a complete failure(same exact light primer strikes every few rounds) from day one. After tweaking this and that and trying to get it to run properly, a case was stuck in the chamber so bad that I sheared the POF charging handle
and broke two teeth off of the M1S bolt(not too bad) to get the rifle apart. Bottom line is the 7.62 x 39 performs best in the AK style rifles that it was designed for. Now I could see the 7.62 x 39 possibly performing well in the SCAR platform due to the design being close to the AK.