Joined the AR club today.

Well guys I picked up my AR today. It's a Colt LE6920. Model number MP6920-FDE I believe. I am in love. I really wasn't going to get one now, but the prices are too good to pass up. I got out the door after Florida's 7% sales tax and $5 BG check for $950 even.

This thing is a beauty. A precise machine. I finally feel prepared for the zombie apocalypse or a civil insurrection. I also have 13 more Pmags coming.

I already took it apart and cleaned it. The bore was very dirty, and the BCG had a bunch of nasty yellow oil-grease. I lubed it according to a diagram I found online.

Now I have a few questions you AR experts can hopefully help me with.

One, is it correct for the bolt to release from the fully locked open position when I simply pull the charging handle to the full rear, and not touch the bolt release (no magazine in)? I sure as hell hope so, I can't remember if it did before I took it apart. Just making sure I didn't FUBAR anything.

Two, I found it pretty hard to get the deep parts of the BCG clean. Is there a special tool or technique I should be using? The same goes for the chamber area. The lugs really obstruct the use of a brush. Tips or tricks?

Three, how heavy should I lube it?

Four, what should I feed this thing? What do you all use for practice ammo? I found some PMC .223 55 Gr FMJ for 34 cents per round to my door.

Five, I know 55 grain isn't exactly optimum for this 1 in 7 twist, but can I expect to get pretty good accuracy out of this? 2 MOA (GUN, not shooter. Think on a vice; inherent accuracy)?

And finally, I couldn't find this anywhere else. My barrel length is listed as 16.1 inches. Does this include the flash hider, or is the flash hider in addition to this?

Thanks guys.