I've had my AR for almost a year now. For the most part all I did to it was throw a set of DD iron sights on it, slap a Comp-M4 on top and shoot the bejesus out of it. Eventually I started getting feelings of "gotta-do-something" whenever I took it to the range.
Over the past few months I've been picking up parts whenever I could find them on sale.
Final product is a PSA uppper and lower, Parallax Tactical M-Lok rail, B.E. Meyers 249F that's been pinned onto a 13.7" FN Herstal CHF pencil barrel, BCM Gunfighter charging handle, BCM Gunfighter grip, Magpul RVG, Inforce WMLx weapons light, and an MFT Battlelink stock.
Really digging this little rifle now (even more so than before).