My M4 looks just like any other right now, but the custom case with a benelli flashlight and a interestingly gripped knife with a matching serial number is pretty unique.
The only downside is the case is a bit oversized, and the foam isn’t cut in a way that permits adding an RMR, a light, or a stock with an adjustable length of pull so I might have to buy another pelican case.
This is my preferred setup with a BlueForceGear padded sling with sewn in QD Mount points.
Having the rear QD link on the opposite side of the shotgun really helps with controlling the weapon when you’re hands off.