Photos have surfaced depicting Mexican Marines armed with the Colt IAR.

This makes sense. Mexico uses the Colt Automatic Rifle (the automatic rifle that has been marketed by Colt for many years) and they seem to be fond of high-capacity drum magazines like the Beta C-Mag.

The Colt IAR is the only IAR competition entrant I have personally shot. It shoots just like a normal AR-15, albeit a heavy one.

[ Many thanks to SpanishInquisition for posting the link. ]