I bow to your greater knowledge in this matter

Yea that is odd as the Grizzly really WAS virtually an M4A1. I suppose If you are Canadian or Australian you have a vested interest but the rest of the world files them (or Achives them) in the back of the mind under as you say 'lost commonwealth projects' although had the M4 had volume production problems they could have been a fine Insurance policy and then we would be patting them on the back like M4's and Spitfires