CanadianGunNutz is the most obvious one and bears mentioning the first. The simple look of vBulletin may fool you, but this site hosts thousands of visitors per day and is likely the most popular firearms forum in Canada. Unlike many of the websites in Canada, this one is very well recognized by retailers and manufacturers, many of whom engage to some extent on the forum. While most threads are somewhat civilized and mostly intelligent, other threads are chock full of trolls, completely uninformed, brand lovers, brand haters, and extremely knowledgeable gun owners all thrown into the same mix. There isn’t really a decent way of getting around this problem with a traditional forum, you need comment voting and threading to properly sort the great comments from the . . .not so insightful ones.
The Equipment Exchange on CGN is free and awesome. Seasoned buyers and sellers on the “EE” will pay via EMT quickly and ship quickly. Be forewarned that if you want to sell or buy on the EE, you’ll need to match these high expectations. This is not Kijiji or Craigslist.
Gun Owners of Canada is fairly new and has yet to hit the number of users that CGN has, but they’ve got some really cool contests and some good people in the forums. It’s notably less “tinfoil hat” than CGN can be.
Alberta Outdoorsmen Forum also does thousands of visitors every day (actually, they usually have thousands of users on the site at any given time.) Also run on vBulletin, the Alberta Outdoorsmen forum is backed by the Alberta Outdoorsmen Magazine. This forum is less categorized as CGN, so it can be harder to find interesting topics if you’re focused on a particular theme. Great if you’re in Alberta, still not so bad if you’re not. I’ve seen a few sellers from other provinces successfully selling their items on this forum.
If you’re on Reddit and want to talk guns, head on over to /r/canadaguns and join us! The voted post + comments system is completely superior to the traditional forum style. If you’re already on Reddit, subscribe!