ODIN Works Extended Magazine Release FDE. The XMR is 4x larger than a mil spec button making it easily accessible by all shapes and sizes of hands and fingers. Works with both AR15 and AR10 lower receivers. Easy install that takes minutes. Specifications for ODIN Works Extended Magazine Release: Manufacturer: ODIN Works Gun Model: AR-15 Fabric/Material: 6061 Billet aluminum Condition: New Features of ODIN Works Extended Magazine Release: Compatible with KNS Pins. Not recommended for use with BAD lever. Four times larger than factory magazine buttons. Large surface area for quick magazine reloads. Easy to reach. Ergonomic design. Release magazine without changing grip or position. Contoured for positive depression and reduced slip. Anodized. Weight: 0.15oz (including button paddle and screws). All parts included. Easy drop in installation. Package Contents: ODIN Works Extended Magazine Release What firearm models does the manufacturer say ODIN Works Extended Magazine Release is compatible with? The manufacturer suggests that ODIN Works Extended Magazine Release is compatible with AR-15ODIN Works ACC-XMR-FDE: Extended Magazine Release FDE