Factory Correct 417 flip up front and rear sights from Adam Weber
Surefire SOCOM Flash Hider for SF SOCOM300SPS Suppressor whenever that actually shows up
Troy Modular Vertical Grip FDE - I love these the way they look and feel.
Magpul FDE ladder covers - configurable any way you want any day you want
US Optics SN-4 -old school, but I really like them
A.R.M.S.® #72Ext-LII 5.56 Cal. MKII Lever® Mount
A lot of people complain about ARMS- I am not one of them, and their MK2 levers are very tight and adjustable.
VTAC sling, I like it, but scratched the Sh*t out of my barrel in the case one day.
I don't have one yet, but I will probably eventually get the Geissele Trigger, the best upgrade to any rifle in my opinion.