If you guys want a limited gun then get an HK416 upper, that is rare hard to get. Consider ourselves lucky Nordic and Colt Canada are providing one of the best small arms manufactures rifles to the market. 10 years ago and before that we all use to dream or tried to get some of the parts from the US of Colt Canada then named "Diemaco" rifles or parts up here. Times have changed in this one area for the best. All I can say is the SAS line is ideal to me and comes in at an amazing price. If you were only to buy one AR that gun would be at the top of my list.
As for the intial launch back in the day from Colt Canada, yes that was badly done, but that was years ago, just move on and get em well you can.