The ModWing is a standalone piece of concealment-enhancing hardware. It allows a user’s belt to apply additional leverage by rotating the holster and the grip of the gun towards the user’s body, creating better concealment and less user “printing” of the firearm and holster. Interchangeable inserts allow the user to choose a strong or mild rotation, based on the user’s attire. The aggressive texture molded into the insert face increases the stability of the ModWing, in turn, the firearm and holster.