For TRUE "Tactical Shotgun Work" Duct Tape is not always secure enough.
Please switch to Chicken Wire and Epoxy to secure that Tac Light and especially the wicked bad "bayonet"
You do not want to lose your weapon mounted blade inside your first deadly threat in the event that you are in an extremely close quarters knock down drag out w/ multiple assailants.
I also see that you are familiar with the Kel-Tec BUG on Stock methodology.
You must have had highly specialized covert training.