Which black rifle?

[spike1]

I'm not the AR expert and I couldn't decide. so I got the cheapest Bushmaster I could to start. I was told it is A-B-C ,, Armalite, Bushmaster then Colt ??? so they say.

Here is the AR I got.

E2S A1 M4 Type Carbine http://www.davidsonsinc.com/consumer...c=50&item_num=

Here I am shooting it 300 yards with a cheap scope on it <$80 ? I guess thats good, or good enough

http://www.youtube.com/watch?v=y-WYUzAIb-8

I have no clue, I could just be lucky with the one I got and all the rest are junk? Or all AR's are better than I gave them credit for ?