Strike Industries Enhanced Bolt Catch, Fits AR-15, Black SI-AR-EBC The SI Enhanced Bolt Catch is another piece in Strike Industries' line of high quality parts for the AR15. The SI Enhanced Bolt Catch 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.