I think that what I've shown is that if you want to replicate the Norinco (14.5" standard semi-auto M4-type) you can do so for around $1000 plus taxes and shipping.
If you want to spend the same money a Stag 16" M4 type costs, you can build a 14.5" american parts M4-gery but with magpul furniture AND a free float rail and still be slightly ahead, but you won't have the Armseast warranty (not an issue for me but it might be for you). the upper and lower receiver are from the same manufacturer, but some people on the resale market might turn their noses up at the build since it's a "parts gun" (something I think is ludicrous if the build is done properly).
Adding magpul stuff and a FF rail to a Stag would cost about another $300. In my case, I can devote that $300 to ammo
To conclude:
- if you want a bone-standard M4 on the cheap: Norinco
- if you want a standard C8A3-like carbine from a brand name: S&W or Stag seem to be the best buys at present in Canada
- if you want an M4 type but you want some go-fast accessories like Magpul stuff or forearm upgrades: Better off building.
One thing I would point out to lejarettnoir:
The gun I built WILL outshoot any stock Norinco and any stock Stag M4 copy, for that matter. The free-float rail is an accuracy improvement that takes the pressure points off the barrel and in virtually every case will shrink groups to one degree or another.
This comes at a cost though. A decent (i.e. not chinese) free float rail will set you back about $150 plus tax and ship or more. In some cases a lot more. that being said, my personal belief is the newer YHM stuff is sufficiently nice - I can't believe what people will spend on a DD or Larue free-float rail, for example.