Magloc extended magazine release for Glock 20, 21 (10mm, 45 cal) Does not fit Gen 4
Extended Magazine Release for Glock 20, 21, 29 & 30 (10mm & .45 ACP) Pistols(Does not fit Gen.4 Glocks)(Does not fit the slim-line G36 and G21 SF )Features: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 model 20, 21, 29 & 30 pistols.(does not fit slim-line G36 and G21 SF )2.  Total weight:   0.06 oz (1.7gram)                                                           3.  Additional width over the standard mag release: 0.134" (3.40mm). Note: G21 Extended Magazine Release has no line on the bottom of the release button to guide trimming.