Compatible with most AR-15 lower receivers, the TacFire AR-15 Magazine Catch Assembly offers quick installation and faithful service right out of the box. This assembly includes a catch button, latch, and spring, and ships fully assembled from the factory. Plus, constructed from durable, American-made steel with a matte black finish, it offers lasting strength and corrosion resistance for any shooting application. Material: Steel Features: -American-made steel construction -Matte black finish -Compatible with most Mil-Spec receivers -Includes button, latch, and spring