Caspian base pads extend magazine capacity for the Caspian-pattern magazine tubes used in custom 1911 and 2011 builds favored by Limited and Open division custom-gun shooters. Caspian frames are a staple of the custom pistolsmithing world, and shooters running a Caspian-based build need base pads sized to the Caspian-pattern tube rather than a generic 1911 or 2011 fit, since dimensions and follower geometry can differ from mainstream magazine bodies. MBX and Dawson Precision extensions are built specifically around Caspian-pattern magazine tubes, giving custom-gun shooters an extended capacity option that actually fits their frame rather than requiring hand-fitting or modification. These pads add usable round count within Limited and Open division capacity limits while providing the same reload-speed benefit as base pads on more common platforms. Because Caspian builds are a niche corner of the competition pistol market, base pad options are limited industry-wide, and this lineup exists specifically to serve that underserved group of custom 1911/2011 shooters. Fast same-day shipping on most orders at Shooters Connection.