While we're on the subject. I'm building an M-4 clone. All I really needed was an upper receiver, bolt carrier and barrel. The barrel is $200, an upper receiver is $135 and the bolt carrier is $125 for a total of $460.
For $465 I could get a complete upper. This would give me a M-4 hand guard, charging handle, Delta ring, gas system for only $5 more. So I'm thinking that's the way to go.
But wait a minute. For $510 I can get a complete kit. this would give me a lower parts kit, collapsible stock, PG and buffer assembly for only $45 more, Hell the LPK alone is worth more than that.
Bottom line is that for $50 more than the price of just the barrel, upper and BC, I got a complete kit. It just doesn't make sense to buy it any other way.
Sure, I ended up with a lot of extra stuff that I don't need right now, but it's worth way more than the extra $50, it cost Me. I just couldn't pass it up.