Here's my favorite:
-Spikes 16" M4LE BAR upper (sailskidrive, you have good taste)
-PSA lower with Magpul MOE stock (since replaced with CTR stock)
-Aimpoint PRO RDS
-Troy Folding Battesights
-Vickers VCAS sling
Pictured also is my CMMG WASP .22LR dedicated upper with MOE forearm and Vortex StrikeFire RDS.