It does take AR mags. I believe he was saying that the original sig rifle didn't take AR mags, but they should have just retooled it to take AR mags and left it. Instead they retooled a lot of it, and he finds the changes to be downgrades instead of upgrades.
:thumbup: My wording was a little obtuse. The original rifle is a true work of engineering art and an excellant rifle. If magazines were easier to obtain, I'd leave it alone. However, in the USA you really need to be compatible with M-16 magazines.
Sigarms USA did in fact take a wonderful state of the art rifle and degraded it for the our domestic market.
IMO it doesn't make sense to have a folding or collapsible stock on a rifle meant to have a scope and be real accurate. Sure such rifles can be "fairly" accurate. But IMO, a solid stock is the best option for accuracy. However someone with real sharpshootin' expericence like M1Marty would be better to listen to than me.
There is a drastic difference in the sub-par folding and collapsible stocks like you find on cheap rifles and the good folders like I have used from Europe. It's sort of like comparing a domestic car to a similar European model.

I really dislike the AR-15/M-16 collapsible stock too. I find the aftermarket stocks work much better then the cheap collapsibles found on your average "M4 Carbine".