Originally Posted by ravan318
I was gonna use the RIS system at the moment, although hearing your response, now I'm starting to consider IUR too
No probs! Something to consider is that like US groups, it wouldn't be inconceivable for CANSOFCOM members to have one lower and both a CQB upper and a 16.8" upper and switch them out as needed. I can't confirm that, perhaps someone else here can. It would certainly make your build easier having an upper for CQB & one for field play.