Tipped off by a buddy:
It’s the Canadian C7A2 rifle, basically an M16 with an M4-like collapsible stock.
I built my wife an AR in that configuration (she’s a foot shorter than me, so the collapsible stock lets us both shoot it). The long barrel still makes it awkward for room clearing (yes, I’ve done it in my own house, just to see) and nose heavy, a trait which would only get worse if you add stuff like tac-lights and PAQ-4s/PEQ-2s.
I didn’t think of the balance issue. That certainly seems like it could be a problem, especially considering that you’re only saving a couple of inches by going with the collapsible stock in the first place.
On the other hand, the Canadians certainly seem to be performing quite well in Afghanistan. Does anyone know how many of the Canadian troops use the A2? What has the feedback from the guys in the field been?
Pic from Colt Canada.