Thanks max_freddy, this thing is great. Better than the Umarex M&P that I was looking at, and that thing is all plastic. I really like the blowback on the metal Winchester 11. How many shots can you get out of a single CO2 cylinder?
Update: I just checked the Canadian Tire website and it doesn't list it anymore. But, D&L Airgun has it in stock for $109.99 and they carry extra mags too for $10.99.
Canadian Tire doesn't list a lot of their air pistols and rifles. I was never able to see the Winchester Model 11 on the site, I just happened to find it at the store. They actually had them at both Canadian Tire stores in my city. I'm always shocked at how much selection they have in store vs. on the website.
Anyways, I can get about 5 mags per co2 cartridge. After the 5th mag the gun turns into single action because there is not enough power left for the slide to re-#### the action. After the first 5 mags, I can usually get 2 more using just single action, then after those 2 mags, the BBs don't penetrate anymore and I change the co2 tank. It is more powerful than the Umarex Baby Desert Eagle I had, which didn't have a blowback slide.
I do quite a bit of shooting with it, and I go through about 3 co2 tanks per day.
There are a lot of great air pistols out there from what I've been reading. The higher end Umarex guns look pretty good, the metal ones. The only problem with the Umarex guns is that the blowback slide models all sacrifice FPS from the muzzle.
I do wish the Winchester had a rifled barrel though. Smooth bore BBs are tough to aim.
I built a BB trap in my garage, so I have a 25 foot BB gun range in my detached garage.

I'm afraid my ignorant neighbors will call the cops if they see me use it, this gun looks and sounds almost like a 22!