Glock complete magazines for G17, G34, G19, and G26 pistols keep Production, Carry Optics, and IDPA guns supplied with known-capacity, match-ready reloads. Glock OEM magazines remain the reference point for dependable fit and function, while ETS and Magpul GL9 options expand the choices for practice, backup inventory, and configured match setups. Full-size G17 and G34 magazines are the standard starting point for USPSA Production and Carry Optics, and compatible extended magazines can support Carry Optics capacity-limit builds when permitted by the current rules. G19 and G26 magazines serve compact Glock configurations and can be selected around IDPA SSP or Carry Optics requirements. Check the exact generation, frame size, caliber, and magazine body profile before ordering; Glock magazine interchangeability is broad but not unlimited. Select capacity and base-pad height around your division's dimensional and round-count limits, plus any magwell or frame modifications on the pistol. Keep OEM-pattern magazines designated for matches, test every tube with your ammunition and recoil setup, and reserve suspect magazines for diagnostic work rather than a classifier. Fast same-day shipping on most orders at Shooters Connection.