What part of an AR15 is restricted?

[darko]

"...Read the printing on the mag!..." The printing on the magazine means nothing. If it goes into a semi-auto, centre fire, rifle, it can't hold more than 5 rounds.
"...What about the Ferret..." What about it? The lower has the serial number. That's the part that is registered.

Here, read this:
http://www.cfc-cafc.gc.ca/bulletins/ShootingCR/bulletin11_e.asp

Take note of this part, which is repeated multiple times in the CFC article:

As set out in Criminal Code Regulations, the classification of a magazine depends on the type of firearm a magazine was designed to be used in, not the type of firearm it is actually used in.

WTF is wrong with some of you people? We finally get legal 10rnd magazines which we can use in our AR15s and all you're doing is #####ing and whining??? Holy crap....