Hunter Brown Belt Holster Size 85 will fit Ruger GP 100 with 4" barrels Size 85 will fit Ruger GP 100 w/4 barrels - For over 50 years the 1100 series has been the most popular leather holster in America.A snap cover incorporated into the holster prevents scratching and blue wear while the unique snap-off design provides easy mounting and dismounting without belt removal. Available in a wide range of sizes to fit just about any handgun. Use w/Hunter's Buscadero Belt and Straight Cartridge Belts. Genuine top grain leather.