Spike's Tactical 16" M4 LE Upper paired with a Spike's Tactical Lower w/ Standard Kit (Spider & Bullet). I went ahead and threw on some extras, including:
1) Magpul MBUS Rear Sight
2) Magpul MOE Carbine Stock (Mil-Spec)
3) Magpul MOE Handguard
4) Magpul RVG Vertical Foregrip
5) Magpul Enhanced Trigger Guard
6) Hogue Pistol Grip
7) Magpul PMAGs x4
I also ordered a Bushnell TRS-25 red-dot the other night, we'll see how that goes. She's 99% perfect for me in her current configuration, and darn near exactly what I wanted/had in mind when I set out to build this AR. All she needs now is a sling (probably a 3-point). I haven't quite made up my mind on the foregrip yet though...I prefer it when shooting from a standing/moving position, but when shooting from a bench (~75% of what I do), I find that it just gets in the way. All-in-all, I'm very pleased with this rifle and would recommend Spike's to anyone who's currently in the market!