Locking the Bolt Back: After the last round in the magazine is fired, the bolt catch engages with the bolt carrier group, holding it in the open position. This feature allows the shooter to easily recognize that the magazine is empty, facilitating a quicker reload.
Releasing the Bolt: When a new magazine is inserted and the bolt catch is pressed, it releases the bolt carrier group, allowing it to move forward and chamber a new round.
Field Stripping: The bolt catch is also involved in the process of field stripping the rifle for cleaning and maintenance.
