The Strike Industries Enhanced Bolt Catch is a high-quality Mil-spec bolt catch designed for AR-15 platform rifles. The EBC features an extra wide bolt catch lever surface, providing effortless operation. Features: a Mil-Spec bolt catch a Wide surface area bolt catch latch for enhanced operation a Solid steel construction a Sleek SI Design NOTE: Not compatible with Polymer 80 Lower Receivers, or non-milspec receivers that feature non-standard wall protrusions or shelves.