Aero stuff is good. I went low buck with the below posted a few pages back. Its sort of a odd duck combo of parts but its complete and tested and I see a great light weight build on a pre FSA lower I have.
Im on the fence on a Wolf Grendel set-up. JG has them on sale (not hugely discounted) but doesn't have free shipping. Not exactly a door buster but a good price and a fine use of a post FSA lower.
http://www.jgsales.com/wolf-wpa-m4-...th-bcg-and-charging-handle,-new.-p-94750.html
Leaning towards the CZ50s or the CZ527.
Must be nice to live in Free America! I remember those days stationed in Virginia and Florida.