I should clarify one other thing, in case my last post was a bit confusing. A 5.56mm pistol mag and a 5.56mm rifle mag are different, only in the fact that the pistol mag has "LAR-15 10-ROUND PISTOL MAGAZINE" stamped on it somewhere. Having these for non-restricted rifles is infinitely better, because pistols are considered Restricted class weapons, and are illegal to transport anywhere other than your house, a gun smith, or a designated pistol range.

In Canada, a lot of us have AR-15s too. We just also have other guns that we can take out into the bush legally and practice with in seclusion.