The Nemesis series pocket holsters use a revolutionary material that sticks to the user's pocket (almost like fly paper) holding the holster in place in the pocket. The Ammo Nemisis carries a single 38/357 ammo strip or a spare magazine. The inside is made of a slick pack cloth for a low friction draw and the core is just the right amount of foam to break up the outline of the gun.The Ammo Nemesis(R) uses the same revolutionary materials as the original Nemesis(R) and still sticks to the user's pocket "almost like fly paper". We added a compartment that can hold extra ammunition. The Ammo Nemesis(R) carries a single 38/357 ammo strip to the rear of the gun compartment for small revolvers. For small auto's, the M33 is fitted with an additional compartment for a spare magazine.