Chainsaw
Super Freak
From all the research I've done, they seem to be in the same catagory. You'll find die hards that swear by their brand wherever you look, and for the most part they all fire whatever you put in it for thousands of rounds without a hiccup. The notable exceptions would be some of the builds, mating the lower and upper, as these are usually put together by people combining the cheapest parts they can scrounge on cheaper than dirt or similiar venues, and I've read that a lot of the parts do not get tested, or worse, are not deemed spec. You can still save a bunch by going that route and end up with a great rifle. I don't think that there's enough of a diference to justify any of the major manufacturer's over another. I looked at the Colt's first, being that they had been around the longest and have plenty of happy customers but got my Bushmaster because they have great customer service if there's any issues. I've already fired about 800 rounds and have not had any issues(FTE's FTF's). Since the price difference between all of the major manufacturers are less than a value pack of Federal's, go with what you prefer visually, because that's going to be the only real difference. (I like having the snake on the side)
I use frog lube on all my fire arms. I just dropped $1k for a AK 
first then be 
once in my possession. I ended up with the SLR 107-21 and got a couple of 30rds Bulgarian mags to go with it.
