Magloc extended magazine release for Glock 17, 22, 23, 37 (Gen 1 to 3)
Extended Magazine Release for Glock 17, 22, 23 .. (9mm, 40 S&W; and .357SIG) PistolDoes not fit Gen 4 and .45 cal GlocksFeatures:1. Made of polymer material (same as the gun) and would not wear out frame slot or factory magazines.2.  Release button can be installed long side forward for easy reach of mag release using the left hand index  finger. 3.  Release button can be installed long side backward for easy reach of mag release using the right hand thumb. 4.  Lines on bottom help shaping the polymer release button to fit individual needs with a file.Specification:1.  Fits all Glock models except Slim line Glock 36, 10mm and .45 cal Glock.      (does not fit Gen.4 Glocks)2.  Total weight:   0.06 oz (1.6gram)                                                           3.  Additional width over the standard mag release: 0.128" (3.27mm). (Note: different shooting sports have different limitation on firearms modification, please consult with the proper authority.) Installation:Warning - always wear eye protection if assembly or disassembly of firearms is required.If you are not comfortable with the installation procedures described below, please have the workdone by a qualified gunsmith.Make sure the gun is unloaded before installation beginsYou can also search the web for the installation of Glock magazine release.1.    Separate the slide form the frame.2.    With the front end of the frame pointing to you, use your left hand thumb to hold down the mag release while using a screwdriver to pry the mag release spring out from the groove.3.    Slide the mag release out of the frame.4.    Reverse the steps to install the extended mag release.Warning:  After installation, test fire your pistol in various shooting position and  making sure that your hands would not accidental activate the extended magazine release.  Also holster test the proper function of the extended magazine release.