Versacarry Inside the Pant Holster, Fits Medium Sized 40SW Pistol with 4 Barrel, Black Polymer 40 MD Zerobulk(R) Holster is one of the smallest, most comfortable, handgun carry devices on the market today. It uses a patented design that secures a firearm by the inner barrel diameter and barrel length, versus the external features of the handgun. Due to this design, it allows its user to carry with external lasers and lights.