Yeah, I can't afford a complete rifle any time soon... I can only throw 200 bucks at it every other month or so... depending on how things go...
That's why I'm going to build it... If I put this rifle on my CC, by the time it's paid off, the interest will be way up there anyways... so I just want to throw cash at parts slowly. I realize at some point I'm going to have to drop a fair chunk down anyways...
What's the difference between forged and billet? In fact... I don't even know what billet is...
Forged = starts as a cast aluminum piece that is then finish machined with all the fine details
Billet = starts as a block of aluminum, all the features are machined
Billet uppers often are not exactly to the military specifications, therefore they do not fit an upper vice block properly, and can be damaged when torqueing the barrel nut on.
Therefore rather than buying an upper vice block you should buy Brownells barrel extension torque tool. You are then torqueing against the barrel, not the upper.
Order all your tools from Brownells in one shot, it will be a lot cheaper than picking them up at Canadian gun stores. Also there are a lot of things that are difficult to find up here. I bought the following items from Brownells:
Brownells barrel extension torque tool $37.99 ($75 at the local gun store)
Brownells roll pin punch bench set $104.99 (not available locally. Maybe a little overkill as not all the sizes included are required for an AR build. But I could not find roll pin punch/holder anything up here)
AR15 lower receiver vice block $49.99 ($75 locally)
AR15 combo-wrench $29.99 ($60 locally)
You can also buy many of the small parts you need such as castle nut, receiver end plate, gas tube, gas block cheaper from Brownells. So if you have your shopping list it is nice to get it all in one shot.
Not everything is shippable to Canada - any of the main components such as uppers and lowers will not be. They usually state which items cannot be shipped internationally.
Have fun!