My Noveske wears a Troy quad rail and front grip. Also a EO Tech on a RRA dominator II mount. A blue force sling wraps it up.
My RRA has a night vision scope and a Vortex flash hider.
My Colt now has a FN 20 inch upper. No extras.
Stopping power: The power some guns have to make you stop what you are doing and get your wallet out.