10R45RG Tripp Research Inc.'s famous Cobra Magazine for the 1911, 45 ACP caliber, ten round capacity, removable 1.587 polymer base pad, government grip length, hybrid follower, 17C .042 spring. 8R45RG Magazine 1911, .45 ACP caliber, eight round capacity, removable.500 polymer base pad, government grip length, hybrid follower, 14C .042 spring. 7R45WO Magazine 1911, .45 ACP caliber, seven round, welded steel floor plate, officers grip length, flex follower, 12C .042 spring. 10R-45-RG Magazine 1911, .45 ACP caliber, ten round capacity, removable 1.587 polymer base pad, government grip length, hybrid follower, 17C .042 spring. 9R-10MM-RG Magazine 1911, 10 Millimeter caliber, nine round, removable .500 polymer base pad, government grip length, flex follower, 13C .042 spring. 10R-10MM-RG Magazine 1911, 10 Millimeter caliber, ten round, removable 1.086 polymer base pad, government grip length, flex follower, 15C .042 spring. 9R-40SW-RG Magazine 1911, .40 Smith & Wesson caliber, nine round, removable .500 polymer base pad, government grip length, flex follower, 13C .042 spring. 10R-40SW-RG Magazine 1911, .40 Smith & Wesson caliber, ten round, removable 1.086 polymer base pad, government grip length, flex follower, 15C .042 spring. 10R-38S-RG Magazine 1911, .38 Super caliber, ten round, removable .500 polymer base pad, government grip length, flex follower 13C .042 spring. 10R-9MM-RG Magazine 1911, 9 Millimeter caliber, ten round, removable .500 polymer base pad, government grip length, flex follower, 12C .042 spring.