The Strike Industries Enhanced Bolt Catch is another piece in our line of high-quality parts for the AR-15. The SI AR-EBC features an extra-wide bolt catch lever surface, making its operation effortless. Its solid construction and clean matte black finish make it a great-looking replacement or build project. It's a great value for an essential item. If you need the parts to keep your AR in top shape, look no further than S.I.Package Includes:1 x AR Enhanced Bolt CatchMaterials:Case Hardened Investment Cast 8620 per Mil-SpecFeatures of Strike Industries Enhanced Bolt Catch: Mil-Spec bolt catch Wide surface area bolt catch latch for enhanced operation Solid steel construction Sleek SI Design NOTE: This product is incompatible with Polymer 80 Lower Receivers or mil-spec receivers that feature non-standard wall protrusions or shelves.