Glock Gen 4 Glock 21 21SF Magazine .45 ACP Polymer Black MF10121 Details

This is a genuine factory GLOCK 21 magazine designed to work in all previous versions of the GLOCK 21 including the new Generation 4. It features the double cut magazine body and will work if you have reversed your magazine release on your Gen 4 GLOCK 21. The magazine is constructed from black polymer, and has a metal spring. .45 ACP 10 Round Capacity GLOCK Factory Part Flat Base-plate Generation 4 compatible with double cut body Polymer Black Fits: GLOCK 21