Here is a link to some build info.
https://www.ar15.com/forums/AR-15/As...ons-/4-226782/
Keep an eye out for sales and daily deals. I shop PSA a lot because they have good quality parts that tend to be pretty cheap. Just be aware that sometimes they get backed up and may take a longer time shipping but unless you need it immediately they make up for any delays in the price savings.
http://palmettostatearmory.com/moe-l...kit-black.html
http://palmettostatearmory.com/psa-a...fire-1728.html
http://palmettostatearmory.com/palme...roup-8779.html
If you want to save a little money and you can wait for a blemished part to become available, they are usually great deal when in stock.
http://palmettostatearmory.com/strip...-receiver.html