Holster systems useable with pants including a plurality of outer belt loops and a plurality of inner belt openings around a waist portion of the pants are described. The inner belt openings may be disposed at a first spacing around the waist portion. A holster or holder may also be provided including an opening configured to at least partially receive a firearm, preferably a handgun, and a plurality of slots configured to receive a strap of webbing or similar material therethrough. The slots may be spaced apart from one other at approximately the same distance as the first spacing.