I picked up an action block and wrench yesterday at the gun show and decided to put my parts together.  I used a RRA lower and upper, RRA bolt/carrier and a  RRA M4 type stock. The barrel is a  Bushmaster 14.5 M4 w/ a 5C2 flash hider.  A year ago I would have never even though about building my own upper but thanks to arfcom it was a piece of cake.  I'm wating on a Larue cantilever mount and my charging handle that I forgot.  Here is the end result.  Thanks for all of the information and instructions that you all contribute!

It looks pretty good, are you going to use a BUIS, or stay with only the optic?

Yes, I am going to get a BUIS but I am undecided on what to get. Any suggestions?  I'm also planning to put a quad rail forend but unsure at this point what I want.   I bought the Tacpoint to see if I would like an optic - which I do so I'll also be getting a real Aimpoint soon.  My next build I think will be similar but I would like to try an Eotech.  

Very nice looking build. I use the YHM 9680 rear flip. For the $$$ it is one hell of a sight.