Arredondo Glock Mag Kits
Complete with extended basepad, sleeve, extra-power spring, and installation tool. Increases stock 15 round capacity by 5 rounds and 6 rounds in 9mm. USPSA limited legal at 140mm. Fits Glock models 17, 22, 34, and 35. Note: these kits will not work with 10 round magazines, or with magazines for compact or subcompact model Glocks.